Yours seems a long story. All those years trying to conceive and the results do not come out positive. Even after changing the doctor. From the experience that i8 have. I have learnt that one has to be sure of the doctor that is attending you. Some are not professional. It is good if you go for one that has been in the profession long enough. That means that they might have come across such a situation before. So kindly be sure if here you go get treatment. And also having one doctor for long term treatment is beneficial. This is to make him or her aware of your long term problem. A new doctor has to get some time before they get accustomed to your illness. Maybe it requires some follow up that needs to have been taken long enough. I do hope that this will help you out. I am not really certain of the solution to your particular illness. But I do hope that you will find what you are looking for.