Probably a stupid question.

Bowser • 🌈🌈 due March 2016
I havent been feeling right the past few days. I just put it down to pregnancy. Been feeling twinges and cramping and just downright crappy.
Wake up this morning and I have what seems to be a uti. Im sore, cramping, getting pains in my lower back when I do go. 
Throwing up too and gagging when I try to go but again I dunno if that is pregnacy related or not.
Ita a sunday so gp is closed. 
Should I go to the maternity hospital or should I go to a&e? 
Or should I just woman up and wait a day and put up with it? Just a bit worried about getting dehydrated