Help please

Can you still be pregnant even if you got a heavy period? Only had sex 3-4 times with a condom... But it's so weird because after becoming sexually active my period became really irregular, and experiencing a lot more vaginal discharge?? Also peeing hot sometimes and only a little but when I had my period I sprayed pee. And I've been pooping a lot. And I'm scared this are pregnancy symptoms... And do you ovulate more when sexually active? I don't know what's going on...and I have a protruding belly lmao don't know if its belly fat