Sinus Medication Solution

After many doctor appointed i finally realize i might have nasal polyps or a very sinus infection where fluid or mucus are trap.I can feel my nasal are swallow up and it is bleeding also.Blood is not gushing our or anything but there are blood and sometimes my nose will bleed.Is there a way to stop the infection so it doesnt lead to surgery.What medicine product can i used to kill bacteria and stop the swallow.I use oasis sinus spray will that help???

I am constantly have issues with a post nasal drip cough and sinus headaches. Headaches get worse after exercise and being outdoors for long periods of time. My dr has prescribed Zithromax for my cough, and I have used nasal sprays for the sinus pressure but the results are short term relief at best.

Im wondering if its time to see a specialist of if theres any other treatments I can try.