I need advice ladies

My usual cycle is 5-6 days, the first 3 being heavy.

This cycle has been 2 days, like I would get towards the end of my cycle, the first 24hr I have really bad cramps (unusual for me)

I had unprotected sex around ovulation, took a text just before my ‘period’ but was unsure whether I had line eyes!

I’m always regular and this isn’t like me! Any advice?