Ladies, I need your help!

Okay, so my guy and I just started having sex recently. We've only had sex 3 times, 2 of which I was on my period. Now my period ran a little longer which I've heard was normal considering before him I haven't had sex in almost a year. My period's been over for about 2 days but I'm having pink discharge as well as a little bit of soreness, once earlier I went to wipe from going pee and got some blood. I'm not really too sure what the pink means. I've looked it up and it says I'm either pregnant (we used a condom every time) or it's an infection. Obviously I'm kinda hoping for the second option but I figured one of you ladies could help me out before I lose my mind and buy a bunch of stuff that won't work haha. Help me I'm poor 😩