Help??

Hello I wanted to see if my fellow ladies could help me out.

My period has arrived the 14 then the 12 then the 14 and now it’s the 17 and no sign of my period. A day or two before my period was due I had sex and when I went to go pee I wiped and it was pink so I thought I was about to start my period but there’s no sign of it. I’ve been pregnant twice before and I don’t feel pregnant. My boobs hurt a bit and my stomach cramps up sometimes. I took a test also 3/4 days ago and it was negative. Any tips or anything to let my mind chill for a bit.