 [ Symptoms ] my mom is allergic to bactrim and was told since she is allergic to it that she is also allergic to sulfa is this true [ Disease ] 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 was not 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  iskipping to avoid a period this can play with your cycle a bit i would contact a physician but if you did not have unprotected sex in the first three weeks of your first pill pack pregnancy is unlikely