Every morning for the past week or so, I have woken up with what appear to be new itchy bug bites of some kind. I have a history of my skin reacting weirdly to stress so this may be psychosomatic. Any thoughts or ideas would be appreciated.

Facts that may or may not be relevant:
-Last week my husband tore the bedroom apart looking for bedbugs. He checked along the seams of the mattress, in the joints of the bed, in my bedside lamp, the heater behind the bed, found nothing. We couldn't really look for what the internet says is typical, reddish brown stains, because we had red sheets on at the time. He put a set of light grey sheets on the bed and we've been checking them every morning. No stains, no crushed bugs, no signs of bug fecal matter, nothing. Sheets are totally clean.
-Husband has not experienced a single bite.
-Bites are, generally speaking, not clustered together. At one point I had three sort of in a row, which freaked me out because that can apparently be a sign of bedbugs, but that has not recurred. With that exception, none of the bites are really near the others.
-I have had some develop during the day, but it's hard to tell if they're new or if I just hadn't noticed them previously.
-Bites are mostly, but not entirely, on legs and torso. They don't seem to have a ton of correlation between areas where I am covered at night and areas where I am not. Last night I wore long pajama pants and a t-shirt to bed and woke up with one on each foot, one on one elbow, and one on my ribcage. At least two of the previous bites are, shall we say, in an area that is always covered by underwear.
-Bites have a definite raised bump, but if I don't scratch, there is no other skin reaction, no red or raised areas around them.
-If I get super itchy, taking Benadryl does help.
-The last time we stayed at a hotel was about a month ago. We have not bought any new furniture in many months. I have not recently switched detergents, soap, or anything like that.
-Husband works from home, so he is here most of the time. I work in an office, so 5 days a week I'm out of the house on the bus or at work.
-It has been warm here in the past week and we have started opening our windows and the sliding door on our patio. They do have screens on them.
-We are in the process of getting ready to move, so house is not as clean as it could be and a lot of dust has been stirred up as we move stuff around.
-In the past in the spring we have wondered if we periodically have fleas showing up from somewhere - in prior years our cat (who passed away last year) would often have what appear to be flea reactions around this time of year. We do live in a very crowded apartment building.
-We know our building has rats - one of them turned up in our kitchen a couple weeks ago.
-I do have a history of reacting physically to stress, including itching, and I'm more stressed out than I've been in a very long time. My immune system is probably at an all-time low, I'm sleeping very poorly, and stress eating like crazy. I have another condition where flare-ups can be caused by stress, and I just had the first flare-up I've had in 6+ years. It's not uncommon for me to experience severe itching all over my legs when stressed, especially if I'm wearing tight jeans. This usually leaves bright red patches on my legs that fade after a day or so. Benadryl and switching to a pair of looser pants usually helps alleviate this.

This is really starting to wear on me, wondering what is going on, lying awake at night wondering if something is going to start crawling on me. Every new itch or tickle I get is immediately assumed to be a bug. Honestly the best case scenario is that it is in my head and I'm stressing myself into bug bites somehow - I would far rather this be the answer than bedbugs.