braxton hicks or ?????

Im 37 weeks and my belly has been quite hard and tight for the past month or so. Lately i have been getting huge baby bulges that stick out. Im curious if it might be from a braxton hick contraction squeezing and pronouncing the baby more or if its just the baby moving. Its hard to tell because my stomach is basically rock hard already!  Thoughts!? What has your experience been from braxton hicks!!?