Cramping after sex- 6DPIUI?!?

Savannah • I`m 30. Had baby #1 after 3 years of TTC, 1 year of fertility treatments. Going to try for#2!
I had my first <a href="https://glowing.com/glow-fertility-program">IUI</a> on Monday... I've had dull cramps the last couple days. But this morning (after sex with my hubby) I'm having really bad cramps. And I felt like my insides were swollen (if that makes sense!?) They don't feel like normal period cramps..... Anyone else? Or am I crazy and just having a stomach ache  lol 😕