With my son, morning sickness kicked in at 5 weeks, lasted to about 13 weeks. Only threw up a couple times but was dizzy and queasy a lot.
With my daughter - dizziness mainly, to about 10 weeks, not nearly as severe as with my son. I don’t know if it was carrying a girl or being too busy to feel sick!
I had a miscarriage at 10 weeks last December, and NO symptoms with that pregnancy at all. No nausea, vomiting or dizziness.
When my wife was pregnant, she only vomited once or twice, and I tend to attribute that to the flu more than anything else. She also hardly gained any weight at all . . . MrsMephisto’s lack of weight-gain even freaked the Ob-Gyn out, but the baby kept growing. The only stereotypical sign of pregnancy my suffered from, other than the inevitable belly swell later on, was her terribly swollen feet.
And of course the mood swings. "I love you, I’m so lucky to have you, I’m so glad you’re the father of my baby you fucking bastard, why do you hate me, you don’t love me at all do you, let’s have sex, burn in hell you son-of-a-bitch, could you go get me some ice cream sweetie, I love you so much that I’m gonna leave you and you’ll never see your daughter . . . " All of which could occur in any given half-hour period of time.
Oh yeah, she suffered some light-headedness, too, but that could be due to another medical problem she has as well. She did get a lot clumbsier. And near the end of it all she suffered some pretty bad back problems.
Mostly, though, I remember those mood swings . . .
All of which is way more info than was asked for. Sorry. My wife’s brief stomach problems occurred around two months, and now that I think about it, again once or twice at around four months. I should note that not long before her pregnancy she had an operation on her abdomen, due to various medical problems she frequently takes weird combinations of drugs, some of which cause nausea, and, as I mentioned, she suffered with the flu during part of her early pregnancy. So, were it not for these other factors, I suspect that she might not have vomited at all.
Every pregnancy is different.
Ah, yes, the MOOD SWINGS. They were so much fun. Normally renowned for being incredibly even-tempered (takes a LOT to get me riled) I recall one night when I had sent out the SO to get some take-away fish n’ chips.
He was taking longer than expected, and I had really worked myself up to needing, nay CRAVING a piece of flake and a couple of potato cakes. By the time he returned (with a soggy luke-warm packet of greasies) I had lost the plot completely, and spent the rest of the evening howling my eyes out, suicidally depressed but with enough homicidal intent to threaten him with instant death if he didn’t go and get some more. NOW. 1.00 a.m. In a suburb that normally closed down by 8.30 p.m.
Amazingly enough, he did it. I was a happy little vegemite then.
The first time it started at three weeks and lasted for the next 38. The second time it started immediately and I only barfed every third day or so for the rest of the pregnancy. It was so much better the second time.
Someday, when you’re feeling too cheerful to live and you badly need to become depressed, I will explain my personal nemesis, hyperemesis.
Two pregnancies. Never had morning sickness.
My cousin’s wife ( pregnant with her 4th in 3.5 years. Can you say fertile Myrtle?) threw up every day for her first two pregnancies ( boys) not one bit of hurling with the third ( girl) and now is horking up the burrito every day again. Odds are (With the track record) it is a boy, but too early to see yet if it will take oxygen for the brain via nostrils or penis.
[Amusing anecdote…it was to me.]
I did nearly throw up once, but it wasn’t because of morning sickness, it was in the late seventh month. Belly getting big. Mr. Ujest and I are on vacation. Decide to enjoy marital relations. He is a stocky lad with a belly of his own ( at my biggest pregnancy size, I still had room to spare in the waist line of his pants…which he did not find amusing.)
During our conjungal visit, I was on top, in the throes of passion, I bend over to kiss him and our bellies ( as you can imagine) squish together. The impact sent my lunch in my already squished stomach upwards and…I was able to clamp my mouth shut to stop my lunch from …uh…spewing over my reason for living and our hostesses nice sheets. which would have mortified me to no end.
My husband, who noticed my sudden disinterest of our activity stopped and asked what was wrong. I took a gulp and said with a smirk, " Do you know how damn lucky you are that I swallow?"
So, the life lesson I’ve just imparted to you is??? Bueller?
Don’t kiss your husband during conjugal relations.
In the homestretch of my first pregnancy now (35 weeks) and I only barfed when my dog barfed on my foot. I had mild nausea in weeks 5-8 or so, but that’s it.
Yes, I do feel very blessed, all around. 
I didn’t really have a problem with morning sickness. I used to get slightly queasy in the evening at around 7 - 10 weeks and I could not stand the smell of cooked rice, but that was about it as far as nausea and aversions during my pregnancy.