Ok first of all, have you taken a home pregnancy test yet? That is the first thing you need to do before getting all worked up. If you dont think that you are able to go buy one at a local convenience store then have your boyfriend go do it. Remember to take it first thing in the morning and dont pee on the stick. Pee in a cup first and then dip the stick in the cup. Also dont freak your boyfriend out, stressing him out about the possibility of you being pregnant is a quick way to loose a boyfriend and if you are indeed pregnant it would be nice to have him around. Catch my drift. If you take the home pregnancy test and it comes back negative then that night take a hot bath, and relax. Watch some tv or read a good book and usually your period will start the next day or the day after. This is because it is possible to psycologically stop your period with stress, if you are waiting for your period to start, it wont happen, kinda like watching the minuets go by on the clock. And just remember to relax, relaxation is the key!!! Hope I helped and good luck!!!!!