Braxton hicks or gas?

Kay • Pregnant with #1!
So I'm having this painful stretching - Idk how else to explain it? Cramping like.. But it keeps getting stronger when I get up so I'm laying down and drinking water and it's helping but only a bit. Never had cramping with this pregnancy .. Ever! So I'm kind of worried. I also haven't gone to the bathroom all day- I normally go everyday. What do u girls think ?