I have been sick for 2 weeks now, but I think it's turning into a sinus infection. I feel fine and have for days now except I am so blocked up and the amount of green snot I can blow within the hour is ridiculous. My ears feel like they need to pop too. But I have no pain and everything else seems to be fine. I have never had a sinus infection before so don't know what to look for. I have a GP app on Monday because it's driving me crazy. Does this sound like a sinus infection? I've never been sick with a cold for this long.