My last period was on December 29, 2006, it lasted about 8 days and it wasn’t a heavy period. [I believe my cycle is long 35-36 days] I had sex on January 1 with no protection and I am not on birth control pills either. Since January 19, 2007 I have been having cramps in my lower stomach [mostly on the left side] on and off with no bleeding at all. I had a few waves of nausea last week, nothing too bad. This week however, I have been nauseous every morning, and yesterday I actually threw up once in the morning and then that was followed by a few rounds of dry heaves. Now my biggest problem yesterday was when I was getting ready to go home from work around 5pm, I passed 2 small blood clots when I used the bathroom. The first clot was in the toilet and the other was when I wiped myself [sorry if im being too graphic…lol] and I also had brownish/reddish color when I wiped too. No other bleeding besides the brown/red color [very light though]. My breasts yesterday was the first day they hurt, they feel heavy and felt like tingly. Today I have cramps mostly on the left side and they go down to my thigh and crotch area, however I have no bleeding just small amount of brown discharge when I wipe, not enough to wear a liner. What I want to know is could I be pregnant? Could the bleeding I had yesterday been implantation bleeding?