Hi, I Had Protected Sex With My Boyfriend On December

Hi, I had protected sex with my boyfriend on December 20,2016 while I was on my period. My period ended the next day.i got my period on December 17,2016. Last week I went to use the bathroom and when I wiped myself, I saw light blood on the toilet paper but nothing in my pee. It lasted for like and hour and stopped. Then last night the same thing happened and also this morning. I wore a pad and there was nothing on the pad. It was absolutely dry. There's no blood in my pee o my when I wipe myself after I urinate. I don't have any cramps. I don't know what this means and I'm very scared.