Pregnant or?...

I've been having unprotected sex with my boyfriend since august. But he always pulls out. I was supposed to start my period on the 30th of October and I still haven't started. I'm not irregular. I took a pregnancy test yesterday, and it came out negative. But it was after I'd been drinking lots of water and I read that it can be inaccurate after doing so. What do y'all guys think ?

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