Help! Kinda long post. 28 weeks with identical boys.

I am 28 weeks with identical boys. I went to pick something up yesterday and something popped in ny lower back hip area, that's been hurting ever since like shooting pain down my leg up my bck and around to my belly. I have back problems as is and use to the pain but this is more intense. Today I can barley walk because I have the back pain going on and really bad pains in my pelvic area everything down there feels swollen and cant be touched. When I get up and walk I have to walk super slow and can not take big steps because the pain is that bad, it's like a someone stabbing me in the front pelvic area but can feel it inside and out. Also I've been feeling like I'm leaking down there I sit or get up and stuff kinda just gushes out but not like I've peed a little type feeling. Sorry for the long post. I'm just afraid to go to the er and be stuck there for days or weeks, I'm very high risk and I have a 4 year old at home that needs me home. I dont want to be in the hospital longer than I have to be.