I've had a sort of head cold (sinus pain, tiredness and headaches) for about 2 1/2 weeks now, just about to start week 3 I think. Now it's coming out a bit more - a bit snottier, a few sneezes, a bit of a cough as well as the other symptoms, headache being the worst. Do I just limp along with it or see GP? I'm actually off work to day as feeling pretty rough with it but haven't taken any time off up until this point.