I have been on birth control for 6 years now and last summer when I took the sugar pills I wouldn't get my period until the third day that I was suppose to have my period. It only lasts 3-4 days. Is this normal or could I be pregnant and not know it??

Pregnancy is possible any time you have sex, even while on birth control. There is no form of birth control that is 100% effective.

Could you be pregnant? Yes. Are you? We don't know, and we can't tell you.

If you feel you may be, then try a pregnancy test using first morning urine.

Good luck.