What is wrong with me?

I have had problems with picking and chewing on different bodily things for as long as I can remember. I never really thought of it being a problem until recently when I sat back and realized that I am 22 years old picking and chewing on things and none of my friends do this.

I pick and chew on eye crust, scabs, skin from my under side of my feet when they are sweaty and also, my nails and skin or scabs from my scalp.

I also just pick my toe jam, ( I have a disability and it's hard for me to clean between my toes) flaky skin when I get any, and sometimes my nose. If my nails are ever dirty underneath, I obsessively clean under them. I will also clean my ears with Q-Tips a lot and sometimes smell the wax or wipe it on my skin but never put it in my mouth. I also like to pop pimples a lot. I feel so disgusting and ashamed.

I have been through all forms of abuse and maybe that has something to do with this but I don't know. I'm too embarrassed to talk to my counselor about it. I see her for depression and anxiety.