Massive lower abdominal pressure?

I'm 35+4 weeks pregnant with my 3rd baby. For the passed couple of hours, I've been feeling some serious pressure in my lower stomach. Not contractions, but it feels like my baby could just burst right out of my stomach at this point. Right above my pubic bone. Has anyone had this happen before, and did you go into labor soon after? I'm actually really hoping she waits until atleast next week because my oldest daughter is in a softball tournament until then and I will be crushed if I miss a moment of it! Lol