My boyfriend and i have been togetherover 2 and a half years. never used protection. why can't i get pregnant?

See fertility doc: You meet the definition of infertility. Both you and your partner should see a fertility doctor if you want to have a child together. Screening tests can be performed on both of you to get a better idea what is going on. Many times there are relatively simple treatments that can really help you, but first you need to have the proper information. Good luck.