21 weeks & Braxton hicks

So since my lazy fiancé won't clean the house I did because I wanted to put up the Christmas tree. We aren't really the "tidy" type because we have a 9 month old and full time jobs but we aren't "dirty" by any means. Anyways, I did a lot of bending and lifting and now I'm having those Braxton hick contractions. I've had like 6 in the past 30-45 mins. Should I be worried?