My last period was on January 15 and ended Jan 21/22nd. My periods are generally very irregular overall. Previous to that my period was November 29.2010 to December 7, 2010. I had unprotected intercourse with my partner in January when the cycle ended 21/22nd and there was no ejaculation. I have still not had my period and its now March 13th. I am not feeling signs of nausea, sore breasts but do get some lower abdominal cramps when I press on my stomach and lower ab area, perhaps from the worrying. I have been a bit stressed in February and now with this also playing on my mind..makes me even more nerve wrecked. I do feel also that I am showing signs of gastritis in upper ab area. I have not taken any tests because of my irregularity. Pls advise. Thanks.