Okay so i had unprotected sex sunday night (April 28th. Im on birth contol but thw night before, i completly forgot to takw my pill and thw night before that i forgot to takw it. Now 4 days later im experincing some nausea, some pain in my breasts, some mild cramping in my lower left and right abdomen, my lower back is hurting and ive been having mood swings badly. The thing is though, i only had unprotected sex 4 days ago, is it possible that i coulld be experiencing very very early pregnancy symptoms? Ive read on here that it all depends on how well you know your body.