I don't have any advice sorry but I can share a little of my experience. I always got AF too, sometimes my cycle length would differ in length but it was never two or three months etc in between. I wasn't ovulating. The eggs were maturing in my ovaries but not releasing instead turning to cysts. We used the drug Clomid to get our DD after 2 1/2 years of TTC. You can read about Clomid on here or with a quick google. I hope you receive some good news soon. I remember the pain you just be feeling right now all too well and it isn't nice. Hugs.