Sounds like Candida OG in your sinuses/ears. I got them over and over prior to the abx/steriods sending me over the ledge into severe candida OG. I still deal with them since my Candida isn’t under control yet.
Good suggestions above which you might want to use; as well as make sure you are using probiotics while on abx. Other suggestions might be Oil of Oregano as it has both antifungal and antibiotic properties. Saline solution washes of the sinuses might be in consideration as well; store bought or home made with sea salt. You might consider oil pulling which I’ve recently learned is very effective.