... not sure when this happened, as I am always extremely careful to take my pill. I'm only on my third pack of pills and have had a lot of breakthrough bleeding my entire experience, and was not shocked when I got my period on the 8th. I had a full period, and have had unprotected sex since then (did not finish inside). I don't know what to do and I'm really freaked out :( This is my first time on the pill and I'm only 18!! please help