34 weeks with irregular contractions

Mo

I was experiencing some lower belly pain on my left side for a an extended period of time maybe 10 mins right before bed not really much belly tightness though so I used a heating pad on low. It did help but now I’ve woken up at 5 am with pain in the same spot and my belly was very hard. I had to pee and it went away but I’m just curious if this is Braxton Hicks or irregular contractions? I am a little nauseous too