Labor?

Okay I know I know, call your dr go in to be seen but I’m 45 minutes away from my dr and don’t want to make the drive unless I absolutely need too. So, at 33 weeks I was 1cm dilated 50% effaced. I haven’t been checked since then. I’ve had TONS of contractions and BH since then. Yesterday baby changed positions of some sort and ever since then my stomach has been super tight, cramping off and on, TONS of pressure in my bottom like I have to poop but I’ve done plenty of that so that’s not it, and back pain/cramping is almost constant. I never had this pressure with my first so idk what this means or what to do. Thank you for any and all advice!