Back pain

I'm 18 and I've had this problem for a while. When my BF and I have oral sex and I think I'm about to cum my body won't orgasm and then my back cramps up, which is extremely painful. This has happened a majority of the time we've had oral sex and sex. 
Is this normal? What should I do?

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