I'm 21 years old, my last period was on sept 5th, 2008, its October 5th and I still haven't gotten my period. my cycle is normally 23 days (Aug 14 was the one before Sept). I've been feeling a little more tired, have more of an appetite, and getting random nausea bursts in the day, like I'll be standing and working and feeling my stomach turn. I took a test yesterday and it was negative, so I've been waiting for it to come. my good friend had the same thing happen to her, she took five of them and they were negative, but she was still pregnant. I'm just wondering if I have low hormone levels? my boyfriend and I had intercourse, and that actually brought on my last period (mid-coitus) which resulting in both of us showering... we had sex this morning and noticed he had some brownish flakes on him, I put a tissue to my vagina and when i pulled away there was some clear fluid and some more brown flakes (I'd say about twenty, the side of a piece of glitter). I know its too late for implantation bleeding, but could that be left over from it?