Braxton Hicks? Or maybe something else?

I'm 22 weeks 2 days a long. So, over the past few days I randomly get this sharp, tightening cramping pain in my lower abdomen. Most times, it's one sided.its hard to explain it. It doesn't feel like a contraction, yet does at the same time. If that makes sense... It comes and goes, isn't coming at timeable intervals.... And it happens more when I'm up and moving around or if I'm sitting in a certain position. I know I've also been having a lot of round ligament pains... And sometimes when baby girl moves, it happens too. She does tend to get still, though, when I get this pain too. I've asked my obgyn about it and she says it's normal... And if I'm worried go to the ER. But if I go to the ER, they'll tell me to speak to my OB.... I'm not bleeding or leaking any fluids. Just cramping a lot. Can Braxton Hicks contractions feel like that tho?? Like I mean I had it so bad one day last week, it had me doubled over and sick to my stomach. That time it was my entire stomach and lasted like 30 minutes.