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One day after my period (17 days ago) during s_x my husband's condom slipped off. We thought we were ok because the condom still contained his fluids altho some had spilled out onto the sheets. However, I've had a "feeling" of "pregnant" and 8 days after that incident I went to the bathroom and discovered blood in my undies. I had some very light pink bleeding that day only. I've had some menstrual -like cramps and lower back pain but no bleeding ever since. My periods are usually right on the mark and I'm not due to start for another week. I never have any problems in between periods and only occassionally have minor cramping with them. I have 3 children and I had this same "feeling" all 3 times before. I took a home pregnancy test this morning and it was negative. I work in a hospital and a friend from the lab ran a beta HCG the day after the bleeding and it came back Neg also. Am I just trying to test to early? Could this have been implantation bleeding? Or, am I making too big a deal of this?