Anyone had unexplained nausea for a few days before period due and NOT been pregnant?

Stephanie

So I'm 13 DPO and I've been having bad nausea (getting worse) for 3 or 4 days. All my pregnancy tests so far have been bfn (different brands). I'm going mad wondering what on earth this nausea could be if I'm not pregnant. Anyone else tested negative at this stage but got a positive later?? I confirmed I was ovulating with a digital test at the time so can't be far wrong on dates 😫

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