HIM

I have started to get these small itchy bumps on my arms mainly...one or two on my torso, a couple on my legs. And some on my chest. Now, these can very well be bug bites, but I am starting to get paranoid because I never see ANY bugs! At first, it looks like a small pimple, maybe water filled...sort of like an ant bite. Then it will itch a little, then once broken itch A LOT. Some of them bled a little from the itching, then a little red dot would be in the center after the itching calms down. Then later, or the next day there would be a little scab. These are pretty tiny bumps. Not clustered, they are spread randomly...are these bites? Are these something else? Any info would be greatly appreciated.