Need some advice please!

Okay so I’m 36 weeks today and I’ve had a ton of Braxton Hicks for the past 5 hours and right now they’re becoming slightly painful & lasting for about a minute and coming every two minutes. I also have a lot of pressure down there. In the front and in the back if you know what I mean lol. It honestly feels like (TMI) I have a big poop waiting to come out but I’ve had diarrhea all day so I know it’s not that. I’ve tried laying on my side and drinking water but that seemed to just make it worse🙄. I’m just really crampy In my lower stomach and back. Im a first time mom so I’m not sure if this is normal or not. Just looking for some advice on wether I should wait it out for a little while longer or call my doctor? I never know when to call lol