Finding pregnancy hard☹️

Today I’ve been having pains in my lower back and sore sore muscles all over. My temperature is high but my body feels cold and I can’t stop shaking. I live on my own and just worried about what it could be. I’ve been down at the labour ward for reduced movements twice before and don’t want to phone again and waste there time if it’s nothing. I’m a first time mum at 19 and not sure if my anxiety is getting the better of me. Any advice would be great. Thank you x