Am I pregnant only 15 help

So i has sex on the last day of my ovulation which was July the 25 and I do know you can get pregnant on that day I had sex with my boyfriend and I know he had on a condom but halfway through he took it off and idk if he cummed inside or not and he said he didn’t but idk then a few days later we did it without a condom and then did it again with a condom.

Idk then I started to get some white discharge it started out chunky but now it’s just thin and white is this a early sign of pregnancy or do I just have a yeast infection

Period due in 4 days

Didn’t take a plan b cause it would’ve been too late and wouldn’t work and I’m to scared to ask my mom for a pregnancy test cause she doesn’t know I’m even having sex