Fertility specialist bound

Well, went in for my annual and my OB is sending me to a Fertility Specialist. My husband and I have been trying for a year with no success. We’ve done a few doses of Letrozole, too. She said I just may be one of the few with unexplained infertility. My husband will do his sample and she checks my progesterone levels next week. Any advice would be appreciated because I have no idea what to expect from a fertility doctor. So far all of my bloodwork is normal and I don’t have a history of PCOS or Endometriosis and I have been ovulating regularly. My mind is just kind of swimming at the moment but I feel almost like I’m just going to be met with more bad news… Any tips or tricks or insight would be greatly appreciated!! 🫶🏼