My boyfriend and I tried having sex about a month ago, but he couldn't get an erection. We were only involved with our hands, and he says he's pretty sure there was no fluid from his end, but he did finger me right after touching his penis. I had some bleeding that lasted about 4-5 days 3 weeks after this happened, and it was red, not light pink or brown. I also took a pregnancy test the day my bleeding started, and one a week after, both of which came out negative, but I've read online it's possible to get a false negative. I've had a little bit of nausea this month, but I think it may be from me worrying. I'm still paranoid, though. Could I be pregnant?