While having intercourse, the condom broke. We were using a magnum, which he claims are structured in a way such that the rubber will fold to eliminate the chance of pregnancy. This was three weeks ago. I'm starting to become extremely worried. I have felt nauseous lately, but I struggled with regular nausea for years now. I can't tell if I'm constantly tired due to having nothing to do or not. Furthermore, my boobs have been tender for the past week. I'm supposed to be getting my period between this week and next week, but the wait is getting to be too much. I can't sleep or think about anything else.