Since my diagnosis 6 months ago, it seems I've constantly got a sinus infection. I have an upcoming ENT appointment but it's still a month away. Hoping they call me earlier with a cancellation. Also alot of post nasal drip, Wondering what affect infected mucous has on my lungs and copd. Is this normal? I never really had sinus infections before my diagnosis. I'm currently (started yesterday after I saw my primary care doctor) keflex (3x daily), behind the counter Sudafed and Flonase 2x a day. Feel horrible and can't afford to keep missing work because of this. Any advice appreciated.