2 weeks ago I was first in my household to get a slight cold. It lasted a few days, then cleared up (mostly). Everyone else got it and it cleared up after a couple of days. Thing is - I've still got green snot, am bunged up in the mornings, a cough and a funny voice. No-one else has. What can I do (or medication take) to knock it on the head? I eat quite healthily, by the way!