Lower stomach pain during sex?

So ever since I lost my virginity sometimes during sex I get this overwhelming sense of pain almost in my lower abdomen. The pain feels almost like his dick is coming up into my stomach or like there's a bunch of air being pumped into my stomach, but it doesn't feel like a gas pain. 
Any of you guys had this experience? Or know what it could be?? 
Thanks 

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