Letting Flu/Cold run it's course?

I think it's the flu I have; Cold / hot, sweated loads whilst asleep last night - woke up and my sheet was soaked!, coughing up mucus, sometimes I feel faint. Felt awful at work today but home now with a gl of OJ and Call of Duty. I was asked to go to the pub tonight but I don't think I should? Shall I just resist taking paracetamol etc and let it run it's course over the weekend...?