My hair will NOT grow back! HELP!!!!?

I had mirena put in 6 weeks after my baby. It is not due to me having a baby i can tell you that now. I lost so much hair then I had it taken out in november of last yr. Because of the stupid IUD my thyroid went out in jan of 2010. So I lost more hair due to that. Now my body is back to normal everything has been checked. people say it takes 3-4 months to grow back...my *** it does! I have been taken saw palmetto, 5000biotin, evening primrose oil, green tree abstract, zinc, hair supplement pill, vitamin D (helped stop the hair falling out) and a multivitamin. I have also taken this other thing with lysine named vitamins too....its been a yr and a half and i lost 90% of my hair. and I can see my scalp and i can wrap my hair in a bun and a small clippy can cover the whole thing in place. Is there anything I am missing? I been doing this for a yr and a half and i do not see little tiny hairs growing in at all....I am eating healthy too....Oh yeah during this whole time i have been using minoxidil too so dont suggest that! I saw 2 different dermatologists and told me nothing! that i will grow back.... this pic was taken right before i lost it all....please help me get my hair back!