My AMH is (was) 0.7 in Nov last year. It's possible it's dropped more since then, but my clinic have always been positive. They said that they have had women with lower results than mine and they have gotten pregnant. I was really shocked and upset by it, but they said that we don't know what it was when I had my first IVF with my son as only my FSH was done then. Although I have had two BFN's this year, my eggs and embryos have always been good. In my second cycle this year, they weren't as good, but it still wasn't disasterous.
Don't give up hope, these are only numbers, which we understandably get obsessed by. I agree with everyone else, get a second opinion.
Good luck xx