I've had this close to a month.
I first got it for the first two days I wasn't even sure that I had a cold or that it was hayfever. Then it became real and and had limited elements of the flu. The wooziness, the sore throat in the morning and the general shitiness. Then the blocked nose kicked in for almost two weeks and things evened out. But every couple of days when I'd sit down at my desk to work I would still feel that wooziness and shitty feeling in my eyes and my sinus area. Then last week around Tues/Wed it just started kicking in again but much harder this time. It took me out for 3 days. Sunday felt like I was on the mend and I was pretty active. Yet yesterday and today it's kicked back in again. If I still feel shitty come Friday I'm going to a doctor.
I haven't had the high temps and joint aches like normal flus. This one has a different feeling to it. I still haven't developed a persistent cough either although the build up of hardcore snot has moved into my ears, which I couldn't equalise for days on end. Wish I could shrink down to the size of a microbe so I could punch all these little fuckers running around in my insides shitting on everything.