with chronic sinus infections...I feel your pain. I would taken antibiotics and I would think I was better. But I learned at around age 23 that I had a deviated septum and that I had one sinus cavity that would never get better as the infection would go dormant but as soon as I was exposed to someone with a cold or flu I would not get the flu or the cold but my blocked sinus would flare up the infection.

Thankfully I had surgery to fix my problem. It was probably the singularly best thing ever for my health. I had no idea how much I wasn't breathing fully, no idea how much flavour food had and how if I have some sort of sinus issue now an antihistamine will actually be effective.

Take care of yourself.