Hi,
I've been with my boyfriend for over two years now. For the past year we've been having unprotected sex, and it happens very frequently (about 4 days p/wk). I'm beginning to get worried because I'm not getting pregnant. I'm 22 years old and I'm very normal with my period. There is no history of infertility in my family nor his. Any idea of what can be wrong??

Well... if you have a good idea when you ovulate, and you have tried for a year without success, its time to talk to a doctor. It doesn't mean anything is necessarily wrong, but you are young (means increased fertility vs older women) and around a year without success is time to see if there are any issues.

Have you any problems with adhesions or cysts? Any known serious reproductive infections?

Don't be frustrated or frightened to talk to a physician. Nobody can diagnose you over the computer. Lots of things can come into play here. Talk to your doctor. My cousins were young and it took a long time to conceive, for really no apparent reason. Talk to the doctor. Then you can start to work through some ideas instead of needlessly worrying about all the possibilities.