2 weeks ago me and my boyfriend had unprotected sex, since then we have used protection. He did not cum inside me but for the past week i have been feeling bad. I am on birth control and i did miss a day in the cycle but took it the following morning. The last time we had intercourse a little bit of blood came out. Could this be because i messed up the cycle? My period is due in 5 days and I am scared that i could be pregnant because my boobs have growing pain, my lower back hurts and i have a stuffy nose. Me and him both are checked and clean..... Please help