Thanks for writing in.
You probably are suffering from a viral or bacterial infection and I would definitely expect it to get better over time. I think Tablet Paracetamol
400 mg taken as and when needed ( upto 4 times daily) will help you feel better. This needs to be taken with food.
I would suggest you stay back from work as this is an infection and you have a good chance of spreading it to others.
Hope this helps.