It could be fleas, especially if you have dogs that spend any time in the yard. Also, if it’s fleas or bed bugs, if I recall correctly from my BB research, only about 30% of people are allergic to the bites. So the red bumps are you being allergic, not that you’re the only one being bitten. It’s entirely possible the rest of your household is getting bites and they just aren’t reacting to them.
I had BB’s after I moved into my new apartment a year ago. Took me a while to figure out what was going on. I’m REALLY allergic, though, to the tune of 3x6 inch welts, so I was very motivated to take measures. All I did, though, was wash everything and make sure it was dryer-dried to over 120F (yes, I stuck a thermometer into the middle of the load in the dryer!). But, I’m lucky that I have all hardwood floors and no rugs. I washed the sofa cover and bought bedbug approved mattress covers, then washed all the bedding and vacuumed everything including the uncovered sofa. Threw out the vacuum bag immediately and spread diatomaceous earth under all the wall baseboards. That did the trick, but I am very sure that the only reason it worked was because the infestation was really light, and me being SO very allergic was a huge motivator. If I had carpeting or more upholstered furniture I would have probably had to get an exterminator.
Fleas, if you treat your dogs for at least 3 months with topical flea medication, wash everything you can and vacuum thoroughly (throw out the bag immediately), that should do the trick with those, too. The thing with fleas is they don’t prefer people, because our body temperature isn’t ideal to them. Dogs run warmer, so fleas will tend toward them, and with the medication on-board the fleas will die when they try to attach to the dog.
Cat Whisperer, you might not always notice fleas. They’re highly unlikely for indoor-only pets to begin with. I’ve never flea treated my cats and I work with animals that have fleas sometimes. At home it’s never been a problem. A healthy cat that grooms well might keep the on-board population in control enough for people not to notice, though. Fleas only start seeking people to bite when they’re too numerous on the pet, or newly hatched eggs that happen to be closer to a person than a cat. The best way to detect fleas on a pet is to use a flea comb, comb very firmly into the coat of the cat, and in several places, along the back and “armpits.” Look for tiny dark brown specks. If you see them, wipe them on a paper towel and drip a little alcohol on the specks. If they turn red, that’s flea dirt. (the “dirt” is flea waste, basically dried digested blood)
Sheesh, I’m talkative tonight. Hope this helps, anyway.