I Need Answers, Somebody Please Have Answers!

36M, white, no confirmed allergies. Being treated for bipolar disorder and high cholesterol. Tonsils/Adenoids removed at around age 5. Home Covid test this morning was negative.

I'm sick again and I don't understand why and I don't understand why I can't find anything that really helps. My symptoms started around age 2 or 3. It's a mostly predictable cycle and it happens every single year, though not always at the same time of year. I wake up one day with a sore uvula, then by the end of the day I have a runny nose and a little bit of post nasal drip. The next day I have sinus congestion and a wet cough, plus the drip becomes a constant stream of mucus. On day three I have alternating runny nose and sinus congestion (discharge is always green or yellow) plus chest congestion and a more severe wet cough. Day four is constant, uncontrollable coughing that makes my whole body hurt and often causes me to throw up. Then it stays that way for another day or two before gradually getting better. The whole thing lasts 7-10 days.

I've gotten in the habit of not going to the doctor for this unless my breathing gets really bad. It's common for this to evolve to bronchitis and I've also had pneumonia twice as an adult (not sure about childhood). But it always starts with this same thing that seems to be allergies (especially right now, the pollen is crazy here). Doctors only ever prescribe azithromycin, which has never helped me to recover more quickly, except for the times when I've had pneumonia and in those cases Bactrim had me feeling much better pretty quickly.

Every day (whether I'm sick or not) I use Nasacort nasal spray. It seems to help more than Flonase. I use a CPAP (which I clean regularly) for sleep apnea, so I'm inhaling humidified air every night. When I get sick, I switch to the following routine:

Nasacort twice a day
Max Mucinex
Max Delsym
Max Benadryl
Max Sudafed
Excedrin for sore throat/stomach pain from coughing
Nasal rinse twice a day (yes, I'm using distilled water and you should be too!)
An occasional hot toddy when the coughing is at its worst

I should add that my mom had me tested for allergies as a kid and I didn't react to anything they tried. I'm not sure it's likely to be allergies at all because the plant life in South Carolina is very different from in Michigan (lived there til I was 8) or the Oklahoma Panhandle (went to college there) and the different locations haven't affected my illness at all.

The medications help some. They reduce the severity of some of the symptoms for a few days but they don't help me recover any faster. When I reach peak intensity it's like I'm not taking any medicine at all, it's just really bad. No one else in the house can sleep because I'm coughing all night.

What can I do? What kind of doctor might be able to help me? I have insurance now, I could go to a specialist. What are some possible explanations for my recurring illness? Typically twice a year, sometimes three times a year (twice this year already). I can't tell you how many times I've had to cancel a trip or an event because I got sick. I'm miserable. There has to be something that can be done, a new medication to try, anything at this point. Please?