Identifying Tiny Biting Bugs?

For the past week I've been getting bitten during the day by these tiny bugs. I can hardly make out what they look like because they're so small. I've come to the conclusion they may be some sort of 'mite', chigger, rat mite, or such because I've rules out other possibilities. They're not bothering other members of my household, only me.

I did find one on my older son and bites on my baby. The bugs bite me on my torso under my clothing and sometimes my legs. I feel like they have been other places too like my arms. When they bite there's a small red dot of blood and it's super itchy. If I scratch or lift my shirt while they bite they run away fast! They die if I capture them and put them in alcohol. Any ideas?