many disorders are dormant...some never manfiest themselves, some do.
It's funny..I also went to a rheumatologist who found nothing and after several pregnancy losses, I went to a hematologist who found several immune disorders..including thyroid and clotting amongst a few. During my pregnancy, I was watched monthly to see if any more popped up, which did not happen but I did have a bleeding episode caused by a clot in my colon at five months.
You have to be your own doctor when it comes to IF..but be careful..there are many docs who treat women with dangerous drugs who really do not need them. Blood thinners are dangerus if not prescribed correctly and one has to be careful when taking them (always wear a medic bracelet when you use a BT).