Braxton Hicks worthy of getting checked out?

Christine • 4 healthy, happy, and handsome sons.
This is my third pregnancy and I am 29 weeks today (yay). I have been having Braxton Hicks since early on so I'm not worried that my body is having them now. I am a little concerned and confused that I've been having so many consistently since last night after my husband and I had sexy time. I counted 16 Braxton Hicks contractions before I fell asleep, I woke up a lot last night with them, and this morning I've times myself for almost an hour and I have had nearly 20. Some come with a dull annoying pain in my back that I am familiar with. I know I've not been drinking as much water as I usually do, so maybe I'm just dehydrated. What do pregnant women do when they think they're dehydrated and what happens to your body when you are. Should I go in L&D today if these stay consitent?