Symptoms of Pregnancy or Bladder Infection?

So I had sex a couple days in a row before ovulation and I ovulated on Tuesday. I have been feeling like I have to pee way more than normal.... Is it possible to feel that before implantation? Or maybe it's a bladder infection because I was laying down after sex instead of running to the bathroom to pee like I normally would.  I'm scared to run to the doctors too soon for this because I don't want to get put on an antibiotic that could possibly effect my chances of getting pregnant when I'm just 2 DPO. Has this happened to anyone else?