When I urinate it burns and hurts, uncomfortable pain after intercourse

Okay, So me and my boyfriend recently had sex! We did it 3 times and I wasn't on my period no bleeding, spotting or anything! The first time we used a condom the last 2 times I let him go bare! When I got home I noticed that when I went to urinate that it burned and as I wiped there was an uncomfortable pain. Like I said no bleeding spotting not on my period. I believe that there might be a tear down between my vaginia hole and butt, and also when I wiped there was a pinkish faint reddish color and I'm asking this cause im a teenager and I'm terrified, someone please help I don't know what to think and I'm freaking out could it be the tear bleeding, cause when I was in the shower and washed down there it started to burn again! For the record he is very large ( if Ya know what I mean) and I'm actually very small I'm petite im only 5'0 and again he is very large down there, could I have a tear from letting him go in bare??? SOMEONE PLEASE HELP IM SCARED, TERRIFIED, and also WORRIED!