well, will it grow back?

I posted down below, but i can't find an answer to my main question, which is all i can do now is try and stop and let my hair grow instead of whining about it being so freakin' thin....

I don't pull, i pick at my scalp and strands of hair come off with it...does that mean i've damaged the follicles to the point that some of my hair won't grow back. Obviously i'm obsessed with this
I think i know the answer, i'm well educated in skin, hair, and in general about the body, i am a nurse, i guess i'm just looking for reassurance...but i did read trich articles on somepeople not experiencing any regrowth. ??????

My personal experience has been that it does regrow but each time I make a place and it grows in it seems thinner...that may be my mind playing tricks on me though. Wish I had more to say.