When to go to the ER

Okay I’m 36 weeks and have been having lower abdominal pain/cramping on the sharper side of cramping and extreme pressure in my pelvis, baby has been moving a lot this has been going on all day but I’d say the last two hours has gotten a little worse, belly getting very tight and I’m not in pain pain but it’s definitely uncomfortable especially the pressure, this is my second baby but my first is 6 and I don’t really remember any pains or pressure or what anything feels like 😭 I have and appointment in two days should I just wait to discuss it with them or should I maybe go in to be seen?