parasites taking my hair out

I have had something going on 4 years now and it has most definily took over my entire body and my hair use to be long and think natural curly and looked as though I had a perm. It looks the worse ever today and still breaking off ends splitting and all I can do is stay more depressed over this whole ordeal than anything. I only want my life back and that is all I ask for and to live a normal life again like I did 4 yrs ago. They truly do take over your life. I take a lot of pepto bismo once a week at least I don't know what else to do. Can I get some help from anyone that believes parasites do live under your skin and in your body, my dermatology says they cannot live under skin,or survive.I guess he just thinks its in my head. I'm fed up with these Dr.s and their input. I should know when my body is telling me something is not right, as well as others. We all know body changes, especially our own.