If you don't mind me asking, how old are both of you guys?
If I were in your shoes and I had enough money, I would try IVF. Yes, its expensive, but if you have the money, the success rates are much higher. I personally think your spending way too much time and money trying low cost proceedures that aren't working for you. If your 35 and older, then your chances of getting pregnant are much slimmer as each month passes by.