Opinions ???

So, I doubt I’m pregnant at all but I don’t know my body is acting weird. I know the plan b can do weird things to your body this is my second time taking and before anyone judges me, I’m off of birth control because I’m single and have been for 6 months. Well, anyways so I’ve had sex 2 guys in the month of January but with the second guy my app says I was ovulating but he bought me a plan b pill I only took half of the pill and I got a period I guess for 3-4 says wasn’t long at all. But I’ve been nauseous the couple of days, peeing a lot more even if I haven’t had anything to drink yet and I’ll already go 3 times, I’ve been craving stuff I usually wouldn’t eat, I’m literally constipated every single day and I drink water and no matter what I do, I’m still constipated for some weird reason and the past 2 weeks I’ve had cramps in my stomach but no period no nothing, and my boobs have been hurting badly lately as well. I know I don’t think I’m pregnant at all, but I just want some opinions or advice. I don’t get it at all.