Maybe, maybe not. Unfortunately the symptoms of pregnancy are the same as pms. Best thing to do for now is get a pregnancy test at the pharmacy - get a 2 or 3 pack so you can be sure. Until you know, act as if you are pregnant - stay away from alcohol, cigs, caffeine, etc. If you get mixed results from the tests, or don't get your period for a long time you should see your gyno or go to a planned parenthood. Best to find out asap.