Anyone else experience Braxton Hicks at 20 weeks?

I was told my last appointment that I’m at risk a higher risk for pre-term labor due to some issues that have been detected with both baby and my cord. Last night I woke up with what felt like Braxton Hicks, then confirmed with my doctor’s nurse over the phone that that’s likely what they were and to start keeping track of them just in case since I’m experiencing them early.

Did anyone else experience them this early either in your current or past pregnancy? Did your baby come early or did you carry them to term? My sister was a premie (4lbs), and my mom said she had BH the earliest (also at 20wks) with her of all her pregnancies, which were all full-term.