I haven't experienced what you are going through, but I thought I should make two comments. First, trying to skip a period when you're on a triphasil birth control is not a good idea. It is the least successful kind of pill to try that with. Second, if you are pregnant, I can't imagin it's normal for you to be in such pain. Maybe someone who's had a very painful early pregnancy can comment. Anyway, I think it's more likely related to your upcoming period. And since you say you have had a period since you and your bf have had sex, it is not likely you are pregnant (although it's always possible to have a period and still be preg, but it's rare, and there is usually something different w/the period).