Spoke to the hospital today. They've got all the test results back and they have all come back clear, so we are now officially class in the "unexplained" category. They are going to start me on Clomid next cycle. I have to take them from day 2 through to day 5, then go in for a scan to make sure that I am not hyper-sensitive to them and over producing.
My prescription will be in the post tomorrow! So exciting! Just hope that they work, if not we will have to go onto the more complex treatments.