I am on birth control and last month my boyfriend and I had intercourse and we believe that the condom broke but now that we think about it we aren't 100% sure it did, and we were intoxicated so that may have impaired our memory of that night. Last week I took my placebo pills and had a period, and this week ive been having nausea in the mornings, a slow, but hard heart rate, and dizziness. Is it possible to be pregnant even if i have had my period from the pill?