I had unprotected sex about 3-4 weeks ago. (one night stand ... lord have mercy)

My period is late by 12 days now. I have taken two tests both negative but i’m still scared because i’m having symptoms. ie swollen sore breasts, excess discharge, headaches, lower abdominal pain/cramps, nausea etc. Maybe I’m overthinking everything because there’s a chance I still may be but I hate the fact i’m left guessing until my period comes!! love being a woman