Overthinking

Unprotected multiple times this month and period is coming up in 10 days. I haven’t noticed any symptoms yet. I’m 120 lbs and 5’4. I Didn’t test yet I don’t know if I’m just overthinking (which I do a lot) or if I am. Plus, I don’t wanna tell anyone bc I might not be and I’m nervous to go buy a test or do anything. Tips? Advice? I don’t wanna go to the doctor bc I might be under my parents insurance and I don’t want them to be receiving a co pay or something and finding out.