Girls, Pregnancy scare, what now?

I’m only 15 years old, I’m supposed to get my period this weekend but it’s not happening so far. I know I’m stressing out way too much but i have 70% of the first week pregnancy symptoms. And I know they come with your period too but they’ve never been this bad so far. My exams are coming up and I’m too stressed to test, if it’s positive I won’t be able to study at all, but if I don’t test I’ll only stress about that too. I don't know what to do I’m scared. I can’t get an aborting without parental permission until I’m 16 which isn’t until July and there’s no way I’d have the balls to tell my mom
Girls, Pregnancy scare, what now?
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