I ran out of birth control pills before my doctors appt and had unprotected sex twice around the time I would normally have my ovualtion. I took the plan b pill the night after the second time. (2-3 days apart). I then started my birth control again about a week and a half later. My period is now 5 days late. My breast are extremely tender and I've been very tired and ill lately. I've still been taking my birth control on time everyday but Is there a possibility that I could be pregnant? If so, could the birth control I've been taking affect the pregnancy?