Chances of being pregnant

So I’ve been on BC for 2 years, i don’t usually get my period every month and i had unprotected sex this past month..( I take my pill accurately) anyways, I didn’t get my period this month and took a test and it’s negative. I still feel like I might be. Am i overreacting? I’m just 19 and not ready to be a mom, my friends keep freaking me out, even tho the test said negative I think i should take another

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