decreased movement at 27 weeks

I'm currently 27+2, and my baby girl seemed to move the first day of her 27th week but now, she has barely moved. I had what felt like really bad Braxton hicks which eventually subsided but since then, I've only felt a faint kick or 2 within 12 hours or so. Is this worth worrying about, or should I wait until I'm 28 weeks to worry?