Not spotting

So my period was due on May 18th. It didn't show so now it's may 19th and still nothing. On may 15th I went to he bathroom to check my cervical mucus and I notice a light pink tinged CM on my fingers nothing else after. It was never on my panties or on the toilet paper so I'm kinda confused. It was also sticky and my period is now 2 days late. I'm cramping and on the middle of my stomach and my boobs are sensitive/tender. Any opinions? Has this happened to anyone?