Need advice !

Kasey • My sweet boy born 19th January 2018 👶🏼💙💙

So I'm 18 weeks and 3 days today,

2 days ago I went to the hospital with really paid cramps and pains in my belly, and they sent me home after doing an ultrasound to make sure my cervix was still closed and fluid was still around Bub.

But last night I was up all night with even worse pains in the same spot and today they've gone into my back and under my ribs and have the tiniest bit of off coloured discharge on my panty liner!

I don't know whether to go to the hospital again as I don't want to be sitting up there for hours again just for them to say I'm fine and send me home!

Has anyone else gone through this ?