Please help!

I have pcos so get my period every 6 weeks usually. I have been having really strong period cramps for days now as my period is due this week. However still not got my period and my cramps are that sore it feels like I've got my period but I still don't? I took a test a week ago and it was negative, do you think I tested too early? Can you still be pregnant but have very sore period pains to the point where I was trying to slowly breathe. Also my ovulation line is getting stronger. Advice please 🙏🏻