is this your first time taking birth control and did you have a period during the first month of your pills? when in your cycle did you have unprotected sex? if it wasn't in the first month (first pack) of your pills it seems unlikely that you are pregnant since most pills provide contraceptive protection after the first month. if you jumped from one pill pack into another (ie. 'skipping') to avoid a period this can play with your cycle a bit. i would contact a physician but if you didn't have unprotected sex in the first three weeks of your first pill pack pregnancy is unlikely.
ive been on birth control for 2 months still no period and have sex without condom regularly. pregnancy test say neg. sore boobs stomach cramps headaches nausea and body spasms regularly