33w+4d, I feel like I'm going to have this baby early!

This is my second pregnancy and I feel like I'm already starting to dilate! I'm not due until June 2nd and I went two days past my due date with my first pregnancy. But I feel like this baby is bigger and in the past two weeks I've had a lot of pressure in my vaginal area. When I walk I feel like there's a rock/ ball between my legs, in addition to all of this I've had some Braxton hicks contrations. Is any one else experiencing this!? And would you get checked for dilation at your next appointment I'll be like 34 and a half weeks at my next one?