Sleep and Sweat!
I know it sounds disgusting but tis the only way.
Get your heating wacked up full and get into bed with loads of layers on, having already taken enough over the counter medication to knock an elephant out. When you arise in the morning and remove your layers like a butterfly from a chrysalis (lol) you should feel much better.
Failing that Nurse Debs above should be able to sort you lol (who needs a chemist?)!
