Braxton Hicks

Jamie • We have a 12 year old boy, 10 year old girl, 11 month old twin boys and 1 month old twin girls.
Ill be 30 weeks pregnant with twins this week and for the past two days I've been experiencing Braxton Hicks contractions but only when I'm up moving around. I didn't feel them with my first two pregnancies and I'm just wondering how many is ok to get before you need to contact your Dr?