Spotting after losing virginity

So I lost my virginity three days ago and during the act itself I bled a bit. We did it a bit rough and it was painful; and we didn't cum as we stopped midwhile.

The problem is that since then I have been spotting a fair bit, and sort of a bit of muccus like blood has been coming out (sorry for the gross-ness) .

I know it's not my period, cause it's not a lot of blood and I didn't have cramps- which is the for sure thing with my period.

Can someone please give me an insight of some kind of why this is happening?

Thanks!