So my situation is a little all over the place but I m freaking out. I m on birth control pills and Tuesday the 28th I was supposed to start my period but didn t and still haven t. On the 16th I had sex and the following week I experienced some bleeding that occurred for about 6 days. From what I read about implantation bleeding was that it usually only lasts a few days so I couldn t tell if it was that or breakthrough bleeding because the tricky thing is, is that I ve experienced this bleeding the past few months right before my period but my period always arrived. Could my missed period be due to stress/emotional distress? Because I just moved to a new city away from my hometown and family which caused stress and a lot of emotional distress.. Other than the missed periods I have not had any pregnancy symptoms. So I m just worried that about whether I could be pregnant or not. Please help...