Baby dust???? Or period just my period

Ladies I'm 8 days away from my period and I've been cramping mild not bad but isn't it to early for me to start cramping ?? 
I also had unprotected sex Tuesday the 2nd 16 days after my period and again thursday the 4th 18 days after my period. Could I be pregnant or not. I had blood drawn yesterday from my obgyn but said it was negative could I be to early ???? Please anyone reading this help me 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors