It will take a pelvic exam by a gynecologist. to determine if you are healthy to conceive and be checked to make sure you are ovulating.

I would point you toward this answer given by Merely Me, the community leader for this site, to start.

She has written a couple of articles you might find helpful, comforting, and even one is humorous, in it's way. She is an excellent writer.

One on the emotional pain of infertility found here and the other on myths of conceiving located here.

Another idea, down the road to think about is your partner's fertility which can be tested. There are ovulation tools online which try to help pinpoint your most fertile days, which you probably already know all about.

The worrying won't fix anything just make everything harder. Please be seen by a doctor and establish that physically, you are fine and if you do, try to write down everything you have a question on.