ok well im 17 and me and my bf had unprotected sex on June 16th (around my peak date) and like a week after i had and still do have real bad nausea headaches back aches and im really irritable i can only stand certain people for a certain amount of time and i started my period on time but only bled for 3 days and it was pretty light. im usually really regular and it last about 6 to 7 days because ive had my period for 5 years now i started when i was 12. but i wonder if im pregnant could i be? someone please reply back ASAP