Pregnant??

Just wandering how many people on here have had false negative hpt results?

I’m a couple of days late for my period (which is always on time) and have been experiencing a LOT of what I would consider pregnancy symptoms; Tender breaths, nausea, aversions to my favourite foods (ice cream is making me sick during a heat wave :().

I know I both had unprotected sex and missed a pill during my fertile window but I took a test today and it came back negative. What are the chances of me still being pregnant?