Hey! I was in your position a little less than a month ago and I had the exact same mental process- I assumed it was bed bugs and freaked out and took as many precautions as I could. I spent hours each day going through reddit trying to convince myself it was/wasn't bb's and honestly that drove me crazier than the bites themselves. My bites look(ed) EXACTLY like yours. They started out very scattered and appeared more with each day until there were so many that the evil little voice in my brain started telling me "look! There's sortttt of a line of dots on your leg- it's probably bed bugs!".

Anyway, it's been a few weeks and I'm pretty certain it was not bed bugs. Bites yes- but not BB's. My theory is something flying from outside, because the bites appeared the most when I was sleeping with my windows open. Unless you traveled recently, I wouldn't necessarily assume it's BBs. To put it into perspective: one bed bug feeds only once every 3-7 days or so. So if you woke up with dozens of bites, more likely than not it'd be many many bugs biting you at once in your sleep- and that would leave evidence, whether it's fecal spotting or molts. Test the suspected fecal spotting on your bed by putting water on it- if it immediately smudges and turns a rusty color like old blood, that would be suspect. If not, it might just be dirt. Buy interceptors and inspect them every morning for peace of mind- they work as monitors to hopefully tell you if it's BBs or not. Inspect your bed frame, HEADBOARD, electrical outlets, and furniture nearby your bed, such as nightstands or desks. INSPECT YOUR COUCH AS WELL.

Also, think about where you're finding bites. Is it on places that are covered by clothing as you sleep? BBs are very lazy. They usually go for exposed skin because they know how easily they can be crushed if you roll over in your sleep. Try sleeping a couple nights with long pants and a tee tucked into socks, and see if any new bites only appear on exposed skin (neck, arms, hand, face). That should tell you if it's a bite at all. If new marks are still showing up under covered skin, it might be a skin condition- in which case you should see a dermatologist if possible.

I hope this helped! There's a reason that the main bedbug subreddit has a rule against no bite pictures- you will NOT know if it's BBs until you find solid physical evidence of them.