Yikes

Okay so I just had twins about 4 months ago, I had sex a day after my fertile window and he didn’t pull out.. but the few days after that I had a bunch of discharge it was creamy and kinda clear/white. I don’t think that my ovulation dates are right on the calendar. Today I would be “11 dpo” should I test? Or wait? Last time I found out I was pregnant at 8 dpo. Just wondering if it’s a higher chance after birth? I’ve been feeling nauseous and have had little cramps on my left side but I don’t know