Yes, I am the same as you. I have CVID, Common Variable Immune Deficiency, so I see an immunologist. I do infusions to myself weekly (subcutaneous injections). Basically, my antibodies are on a permanent vacay! I am putting other people's antibodies into my body with the infusions/protection against the flu, covid, pneumonia, etc.. in the medicine for the infusion.

Have you seen an ENT Dr. yet? They should order a CT scan and see what your sinuses look like? I have been numerous times to the ENT Dr. Only certain ENT Dr's do surgery, not all ENT Dr's do surgery or want to do surgery on you. I had recent surgery in 2023- sinus surgery-outpatient, basically I had blockages in my sinus cavities, so they went in and cleared it all out. There's also a "balloon" type procedure that is in office and I had that done too. It helped tremendously, I feel so much better after both procedures. If you haven't seen one, I would encourage you to go see one and request for a CT scan to be done, if you haven't had one done on your sinuses lately.
Do you do the netti pot or Navage? I do this daily and it helps a lot. I get numerous sinus infections, ear infections and upper respiratory infections, that is the CVID. I use to get anywhere from 6-8 in 1 year. I was sick most of the time, on antibiotics or steroids, going to the Dr's. I was miserable. Use saline solution to help with your dry nose, I use that. I also use flonase too. I have found I am allergic to many different things outside, grass, trees, mold, pollen, dust, etc... It helps me to wear a mask when I am outdoors and in big places with lots of people I wear it inside as well too. I take Zyrtec every night and have for many years.
I have dry eyes, dry mouth and I thought I might have Sjorjen's. Went to Rheumatoid Dr and she tested me and she said no, I don't have that. I also have shortness of breath, asthma, 2 lung nodules (tiny), bronchiestasis-scarring on the lungs, coughing asthma, sore throat, difficulty swallowing, drainage.
I have done allergy shots- 3 different rounds- when I was young, when I was in my 20's, when I was in my 40's. I never really noticed a huge difference with allergy shots, my allergies have always been bad to deal with. I hope you have better luck that I did. They are expensive, so I gave up on allergy shots. I have moved on to a Functional Medicine Dr., I have some fatigue that I don't understand why I have it. The lady I go to is wonderful, she did extensive testing on me- with blood work. She is finding I am lacking in B vitamins and need additional supplements. I have memory issues as well, so she is giving me a supplement for my brain issues. Seeing a Functional Medicine Dr is more costly, however I am seeing a lot of benefit from it. It may be something you might want to explore in the future. Sometimes insurance will pay some on it and other times they won't pay on it, depends on what it is, I have found with insurance. Do you use a netti pot or Navage? If you don't, I would highly recommend getting one of these and using it, it does really help you feel better. Hope you feel better- I am on my 2nd steroid and 2nd antibiotic, as I am not feeling well right now. Saw the ENT Dr. today and she ordered a CT scan and she is doing testing on my phlegm to make sure nothing else is going on.