Thanks for the responses everyone, and for the advice. I am relieved to know I'm not the only picker around.

I'm starting to take biotin and iron supplements, and I bought some vitamin e oil to massage on my bald spots. Hopefully that will help my hair grow back faster.

My husband told me he's noticed me rubbing/picking at those spots a lot, but never thought anything of it. I told him to stop me from now on if he sees me doing that!