Help?

My baby was measuring big at 34 weeks, don't know what she is measuring now at 35 weeks but I'll ask at my next appointment on the 28th. But I am having MAJOR pelvic pains & pressure, can hardly walk or get out of bed.. I'm uncomfortable, so so uncomfortable. I have back ache like no tomorrow. I feel like something is coming out of my damn VAG! But no water broken yet.. what's going on? Should I get my cervix checked or what? I really feel like she's coming out or something. It HURTS.