Is this all normal??

I'm experiencing bad lower cramps and also back pains going to the sides of my hips. I'm 27 weeks pregnant, I've had Diarrhoea recently and being sick a lot. I don't feel like I have a stomach bug as I feel like I'm on my period. I've had a lot of jelly coming from my vagina in big amounts. Lots of Braxton hicks too. Waiting for midwife to call back, I've had paracetamol and it's not helped! Could this be normal?