Here's my history:
I am a 40yo male, and have had what appears to be chronic sinusitis for
~15 years, first dx 6 years ago.  I get 1-2 acute infections each
winter, and these usually respond well to Avelox or Augmentin.  A CT
scan during an infection 5 yrs ago showed "extensive mucoperiosteal
changes involving both maxillary and ethmoid sinuses with obliteration
of the osteomeatal complexes bilaterally".   Allergy tests 4 yrs ago
showed response only to dust mites (I have mite-proofed).

My main difficulty is sensitivity/intolerance of "cold" weather.  I
moved to SoCal to avoid the Midwest winters and that has helped a lot,
but anything below 75F is too cold for me.  If I get a chill, the rest
of the day I will be tired, feel sick, often a sinus headache, PND
(clear/white) the next day, and it takes a few days or a week to return
to my normal.  I can't spend more than an hour in a 70F room before
I'm chilled.  I keep my apt at 80F.  My head/face/forehead and chest
are the most sensitive areas.  I wear a wool hat pulled down to my
eyebrows, nearly all the time.  (In a Midwest winter, I wore a full
facemask and 2-3 hats, and still I felt ~sick all winter.)  I wear more
warm clothes than anyone I know.  No ice water or ice cream, etc.
Other definite triggers: cigarette smoke, car exhaust.

I think there are two issues here:  1) I "run cold" (why?), 2)
something in me (probably my sinuses) gets worse if I get a chill.  On
#1, I've asked numerous Drs. and had numerous TSH tests, all normal.
They have no explanation.  Any ideas how to find out why, or what
helps?
On #2, for those that have had cold sensitivity, what has helped?  Has
surgery made any difference?  I plan to see an ENT soon but should I
see a different specialist, too?

My self-care for the past 6 years is:
- 1-2x/day irrigation w/ ear syringe (pulsatile when sx are worse)
- Diet:  lots: fruit/veggies, water.  minimal: sugar, alcohol, dairy,
caffeine.
- 8-9 hrs sleep/night, 10+ when sx worse
- Moist heat to face 2x/day (also for mebonionitis of eyes)
- Flonase 1-2x/day (preventative, I think it helps)
- Mucinex when sx are worse

I had a number of infections 5-6 years ago and saw 3 ENTs : 2 rec'd
surgery, but Dr. Lanza at Cleveland Clinic (5 yrs ago) did an
endoscope, saw nothing unusual, and was not convinced that sinusitis
was the main cause, so I didn't get the surgery.  Since then I've
learned the risks/triggers and can "manage" the problem, but at the
cost of very limited outdoor and social activities.  I've gotten a
little worse each year and do not want it to define my life.  I'd
welcome (informed) suggestions.  Thanks.