suggestions for testing

LT
So this month, because we were no succussful, I am beginning some tests to figure things out. Starting first with some bloodwork, but also have a referral to get an ultra sound, and after all that, to our local fertility clinic. 
Does anyone have any suggestions about what else I should get checked or tested? No history for me of infertility in the family, thyroid and vitamin B12 issues that I am dealing with and controlling. I've been pretty regular since coming off the pill (exception this month, maybe due to travelling).