Insect and Spider Identification: Please identify this bug on my bed. I have bites all over me, 1 by kittymickey

kittymickey wrote:
I have small red bites on my body all over me on my legs, hands, arms, stomach, e.t.c. I find about 4+ new bites on me every day.
A couple of days ago I found one of these bugs on me and killed it. I saw another one the next day, but it got away.(They are fast runners) Then today I finally found another; it was on my bed; I caught it and I took pictures of it. This bug has 8 legs and it is the size of an ant.
I don't feel any pain when being bitten. In fact on the first bites I didn't know I'd been bitten until it started itching.
Is this bug dangerous? What in the world is it? I'd sure like to know as soon as possible to find a way to get it out of my house.
Thanks so much in advance!