Worried...

I had sex for my first time last week. A couple hours after I had this horrendous pain and I kept feeling like I needed to pee. But when i did go it hurt really bad and when i whipped there was a little bit of blood. I thought that maybe my vagina had ripped a little bit because my fiance is huge. But a week later it doesnt hurt as much but it still feels off. Should i be worried, or should i wait and see if it gets better?