<s>[INST] For the past 3 weeks I have been taking a new birth control, but not regularly. About 3 days ago I had unprotected sex and my boyfriend ejaculated in me. I started bleeding 2 days later..my period is supposed to start on the 10th could this be my period or bleeding from the irregular pill taking? And could I be pregnant if this is my period? [/INST] Hi, Welcome to Chat Doctor forum.  When you have bleeding, pregnancy is automatically excluded, there may be pregnancy even after bleeding in 1:1000 cases. So don't worry about the pregnancy. It may also be due to the pills also, in that case also, same result. If you want to exclude, have H.P.T.next month you may have the period on the same date.  Take more of green leafy vegetables, pulses, sprouts, and protein rich foods.  Wishing for a quick and complete recovery. </s>