TMI, repeat c section mommy

I am almost 33 weeks with my 3rd baby my belly has dropped over a month ago. And all of a sudden in the past 2 weeks I've had super bad cramping in back and pelvic area. had a weird burst of energy for a week. And now ive been having uncontrollable painful direaha and vomiting. I'm not sick like cold or flu already been tested. But my doctors cant seem to explain why its all happining. I really don't feel like I'm going to make it to my c section date. never been in labor but all these things are exhausting me mentally and physically.