Nicotine detox or sinus drainage?

I just quit smoking a little over a week ago, and yesterday I was diagnosed with a sinus infection, and prescribed Amoxil. I've been taking the antibiotic like I should, as well as Tylenol Severe Sinus for congestion & drainage. I'm feeling a bit better than I was earlier today, but I keep getting this weird feeling in my lungs, like they itch. I've searched it but everything seems to say it's either asthma or pneumonia, but I don't have shortness of breath or fever, so I know those aren't the causes. I was just wondering, maybe is this a result of nicotine detox & drainage?