I had unprotected sex a few days before my period and during the month between my period. My period came a few days late and was bright red with no clotting at all. I usually have a five day period and it lasts 5 days. Well this one only lasted two days and is coming off and is still very bright red. Does this mean I got pregnant and conceived right before my period was supposed to come? Or does this mean something else?

It means that what you described happened, while yes that can be a sign of pregnancy, it also can have nothing to do with pregnancy.

Got to wait until next period and if you miss it, do a pregnancy test.