Please help! Maybe preterm labor!

Cody

Hopefully someone here can help me and tell me im just over thinking. Im 30 weeks but for the last two weeks I can’t stop hurting. Im constantly having cramps and lower back pains but my doctor tells me it’s normal. Also I feel like someone punch me in my vagina bone it hurts so bad and gets worse when i walk. I’ve noticed extra vaginal fluid but she tested it and said it was the sac or anything so I should be fine. I have now started to lose weight and im constantly running to the bathroom to pee or diarrhea (sorry tmi). I do drive forklifts for a living which i have to drive in reverse for 8 hours so my body is constantly twisted in a weird position so im thinking maybe this is where the pain could be coming from. Please help did anyone have any symptoms like this and actually went into labor early?