Braxton hicks or something else?

I’m 36 weeks with my first baby. I went to church tonight so I was sitting on a hard pew for about 2-3 hours. After about 30 mins I started getting pains in my front lower abdomen that would last just a few seconds before going away and then coming back 5-10 minutes later. It wasn’t super painful, it was mostly just uncomfortable. That lasted on and off for another 30 minutes. After that the pains moved to my lower back. It was a constant ache that lasted well over an hour but every once in awhile the pain would increase and be kind of intense for a minute or two at a time. Is this just braxton hicks or something else? My doctor tried describing what braxton hick and real contractions would feel like at my last appointment but this doesn’t seem the same as what she described. Can braxton hicks even be in the back? I’m considering getting checked at L&D but it’s late here so I don’t want to go if it’s nothing.