I've been TTC for awhile as well and I getting a BFN is always disheartening. I was also worried maybe I can't get pregnant? Last month I started BBT charting and I got the rise in temperature your supposed to get after ovulation, which means my luteal phase is more than 12 days. That means I should be able to conceive. Maybe you should try BBT charting if not already? It may give you more hope, seeing my spike in temperature always makes my day! Good luck!