Not giving up!!

Alexzandria
My boyfriend n I have been 2gether 4 5 yrs now n recently we hav decided we wanted a baby. We hav always had unprotected sex n r now wondering why haven't I ever gotten pregnant in the 5 years of our relationship. Becuz believe me we hav had our mishaps, but still managed not 2 get pregnant. now my boyfriend n I r in good health. N we hav been trying 4 about three months now, n I have yet 2 have positive results. there r some times that I feel that I am but once I test, it is always a bfn.we r not going 2 give up but sometimes it does make us sad.
Why do you think we are having trouble, what are your opinions on what we should do to improve our odds of conceiving? Any suggestions?