My boyfriend and I had sex on 10/14 (friday). I just got off my period about 3 days prior from Friday, he (pulled out) but we still freaked and we got the plan b later on in the afternoon. Its now 10/16 and I'm freaking out because I believe I was ovulating or maybe my nerves. But should I head out and purchase another just to make sure? I have 4 hours left better safe than sorry!! Help. Will it affect the first pill?