Braxtons so early??

I'm 16 weeks with twins and for some reason the past 2 days I've been having Braxton hicks. I have 2 other kids so I'm pretty sure they're Braxton hicks. It lasts for a while and super uncomfortable.

I'm not 100% sure if it's safe so early or if I should call my dr or what this means.

I'm so scared especially since they're twins and it's high risk.