Identifying a Bug Found on the Bed?

I found this bug on my bed, it's extremely tiny and very hard to see. My bed is also by a window, like right up against it so sometimes I get carpet beetles and spiders by my bed. Anyway I don't know what this is, but lately I've been getting very itchy bites on my body. I keep thinking it's bed bugs, but I check my bed every morning all round the sides, under the sheet, mattress and still nothing. This has been going on for a couple weeks.

The bits don't look like bed bug bites, they look like raised white mosquito bites honestly. And they are pretty big bites, like a normal mosquito bite. I was laying in bed one morning and there was a beetle type thing on my arm and it ran off to the pillow. I grabbed it quickly and observed it, but killed it before I got a picture. I looked up what it looked like and it reminded me of a bed bug, though it was larger than normal bed bugs. The bug I saw had a round body, was a orangish brown color and had stripes on its back. I'm kinda thinking this bug I found tonight is a baby bed bug but? I may just be very paranoid. And also I don't usually have allergic reactions to sheets, blankets, or the soaps in the wash so it can't be that. I've had mites before and it's not the same bites either.
Please help!