Should i worry about this lump on my back? it is a small pea sizes lump and you can't see it only feel it. doesnt really hurt but i've been rubbing it cause its making me nervous so now it does a little. it has not grown at all though

This : This is difficult to answer without a clinical examination so i would recommend you see a dermatologist. Possibilities might include a cyst, a mole, a lipoma, a skin cancer, a seborrheic keratosis, and other possiblities. Check out the link below to see a picture of these. I hope that helps!

Likely minor: Definately worth getting it seen by PCP