Pseudomonas Sinus Infection

I have had recurring Pseudomonas Sinus Infections since summer 2023. I started getting these about 6 months after my sinus surgery in Dec 2022. I have been on and off antibiotics since summer 2023. I have taken Levaquin and Ciproflaxin. It seems that Levaquin works the best. I am also doing Tobramycin sinus rinses but as soon as I am off the meds, it comes back. My symptoms are green sinus drainage, a lot of it. I had a CT scan done a few days ago 2/17/24 and the results came back submucosal thickening of my sinuses. At this point, I need a different type of treatment because pills are not keeping the infection away. I am worried that this could spread to the brain? if it were to spread to the brain, would that show on my CT scan?

Can someone please share what helped you get rid of your Pseudomonas Sinus Infection ? it appears that Levaquin and Tobramycin rinses aren't working for me. I read online that some people have had to take IV course on antibiotics. I have a follow up with my ENT on 3/7/24 and will ask him about the IV meds as well. I also read online where some people have asked to be referred to an infectious disease specialist. Any success stories of treatment would be great. I have anxiety as well and I am just concerned this will spread to my brain??