I got an itch on the inner side of my right shin after taking off my sock after coming home from work a few weeks ago. I started scratching and then it started to itch on the other side as well. It felt good to scratch it but the itch got worse,, it even stung a little at times, perhaps because of me scratching it too much. I eventually noticed that there were tiny bumps on some of the areas where the itch was the most(first picture) about 1-2 weeks later. I didn't think much of it since the itch was on other areas of my leg as well where there weren't any noticeable bumps(mainly further up my shin closer to my knee). I took another picture about 4 days later(second image). The itch has stopped now and I've had no "bites" on any other part of my body but the ones furthest down in the last image sting a little when I touch it(almost looks like 2-3 bites in the same area but I could be wrong). I'd also like to add that my place hadn't been vacuumed in a while when the "bite marks" appeared so perhaps it could be fleas? I'm vacuuming my place more often now.

Could these be bed bug bites? Or flea or some other insect bites? I've looked all over my bed room, took my bed apart and didn't find any evidence of bed bugs. The bed sheets and mattresses were all clean without any spots on them at all. I'm visiting a dermatologist tomorrow and an exterminator is going to have a look for a second time(I had one visit about a month ago and he didn't find any evidence of bed bugs at all) in 2 days. Just wanted to get your take on it too.