I wish there was a special formula that is guaranteed to get you pregnant, but i'm afraid not. Alot of people on this forum have been trying for a while. It's exciting when someone does get pregnant, but a lot of us are still trying.
Since you have been trying for 3 years and seeing specialists, you probably already keeping track of your cycles, taking pre-natals, predicting ovulation, and taking your bbt. That is most of what the womenon this forum do. In addition to that, some women on this forum also take ovulex, which I think is an herbal supplement.
It sounds like you've been through a lot. I hope you stick around for emotional support even if we don't have tips that you haven't tried already.
Best of luck to you and lots and lots of baby dust!