Bleeding two days after sex?

So my period ended last Tuesday. I started my pills like normal on my normal starting day (Friday) and had sex that day with a condom and he pulled out with the condom on. WE CHECKED FOR HOLES AND TEARS in the condom by putting water in it and there weren't any. We also both washed our hands. The condom was ribbed and it hurt really bad at the end to the point that I had to make him stop and almost cried. Now, two days later, there is a tiny bit of blood in my discharge. Almost nothing and it was really hard to see. I'm not supposed to "ovulate" until next Friday and, even then, I'm on the pill so I shouldn't ovulate in the first place. Is it possible that the rough sex cut me and I bled a little a day after, or could I actually be pregnant?