I'm 19 and I've been taking birth control for a year now, I take Vestura which is a generic version of Yaz. I've been having sex with my boyfriend for about 3 months now and tonight is the first time that he didn't wear a condom. He pulled out, but the cum was still near my vagina. I only have a week of active pills in my pack left, I have not missed a single one and I take my pill everyday between 7:30-9:30 am. I'm still very worried. Should I take Plan B?