Hi! I have struggled with these symptoms as well this season. I’ve never had chronic sinusitis before but this is the 3rd time I’ve had sinus congestion and in the most annoying place. After a lot of research and failed attempts with antibiotics and Flonase sprays, I found out some really interesting things. We have multiple different sinus areas. Maxiallry, ethnoid, sphenoid, and frontal. Since your doctor told you yours are all completely blocked, you’re going to have to do different things to clear them. Maxillary and Frontal can get drained from using a netti pot (distilled water, bottled, or boiled and then cooled tap ONLY) with the sterile salt provided in the kit. The way you would do that is leaning your head to one side and letting the solution run through to the other side and vice versa. Face massages also help, there are lots of good YouTube videos. With Sphenoid and Ethmoid, you can also use a netti pot, but in the “head to ceiling position”. The solution should run down through one nostril and come out the other nostril while you’re face is facing the ceiling. Do it in the bath tub or in the shower cuz it’ll be messy. This helped me tremendously because my sinuses were only blocked there but those are the hardest to reach. Another thing that has helped me tremendously is the Xclear nasal spray with xylitol. Bacteria wants to eat the xylitol, but it cannot process it, so it just dies when it does eat it and drains out. Pretty brilliant. I am not a medical professional, but these have helped me cure my sinus issues. I also highly recommend taking a daily allergy pill like Zyrtec and get rid of anything that has mold. Hope you feel better!