Fell sick during pregnancy 17 weeks

I am currently 17 weeks and 4 days pregnant. And i fell sick for the pass 3 days. Having fever on and off at 37.5deg, cough, sore throat and flu. And natural remedies to suggest? I've seen the doc 2 times but fever still did not subside and my essential oils are all useless. Pls help this mum to be. I'm so restless and so worried as this is my 1st baby.