Relax. Try to, anyway. Get a good multi with folic acid (if you’re diet isn’t great, see if your doctor will give you a prescription for pre-natals while you’re trying to conceive.) I would get someone else to handle the litter box, because - hey - who wants to clean the litter box when your nose is super sensitive and your stomach is extra queasy?
It sounds like you already know the things you should avoid: soft cheeses ('though I didn’t, because I never even found an unpasteurized cheese), lunchmeat (again, I didn’t, because…well, just because I think the risk is overstated and I like honey ham), peanut butter (again, YMMV based on whatever you read this morning), alcohol, cigarettes, etc. I don’t think there’s any reason to avoid any of these until you’re sure you’re pregnant though.
Also, remember that large sea fish are out, due to the risk of mercury poisoning. Chunk light tuna is fine, apparently.
Remember that the first two weeks of pregnancy, before you miss your period, are pretty much a get-out-of-jail free card as far as substances go. The zygote is still free floating and nourished by the egg. It’s not “hooked up” to your body or getting anything out of your bloodstream. So don’t freak out about a few glasses of wine on the conception night. It won’t hurt the baby.
Also remember that often with these things, the quantity makes the poison. There is no evidence that a single glass of wine during pregnancy causes any problems whatsoever. This becomes even more true the later in pregnancy you are. By the fourth or fifth month (after morning sickness has gone away and you’re really craving a Cosmo), even a couple glasses of wine in a night for a special occasion are not going to cause birth defects: the gross anatomy is already formed - the baby’s just growing at this point.
Obviously, talk things over with your doctor and don’t do anything that feels wrong. But I hate to see women freaking out because they forgot and took a sip of champagne at a wedding, or worse, other people getting all judgemental because they see a pregnant woman with a beer. Alcohol has been drunk by pregnant women since pre-historic times without going overboard and harming their babies most of the time.
If you regularly throw back a fifth of Jack Daniels in a night, forget all that and go sober.