How do I time these contractions?

Justia
Do you ladies know how to time contractions? And when to time them? 
I'm having sharp period cramps  in my lower abdomen. it seems every 8 mins. They are not unbearable though. When I moved around they stopped but when I sat down they started again. 
I don't know if this is it y'all! Or could this be false labor? 
Let me know 

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