Round ligament pains

Brittany • Chloe Elizabeth 7-30-13. Sophia Grace 10-15-15. Baby #3 09-20-16
What did round ligament pains feel like for all you pregnant momma's out there? I'm 18 weeks today and feel like I may possibly be experiencing these pains myself, but I'm not too sure. This is my second pregnancy, and my first was 2 and half years ago, so I can't even remember if I had them with my DD or not or when I even began to experience them.