hello allthecoachhouse,
sympathies with the sinusitis, rang a lot of bells with me. Have suffered with this all my life but started HRT last year, was upped to 100 estradot patch and nightly utrogestan as symptoms kept getting worse my dose was upped again. I am 63 and thought I'd start to help with muscles, anxiety, energy etc It actually made everything worse and interestingly the sinuses just became so inflamed, painful teeth etc just like you, went to see ent camera showed no infection, back with menopause clinic said it was histamine response to hrt, had to stop, which i did in January this year, 4 months later had the worse case of sinusitis in my life, 3 courses antis, stabilising now ish!
the hrt has definitely not worked for me and particularly the sinuses, it is clear the hormone balance plays a big part in how mucus membranes operate in the body including sinuses, i am not sure what to suggest for you as you are probably getting other benefits from the hrt, if the sinuses aren't infected then you could try sinus rinses, company called neilmed have a lot of info on website and you can buy the kit at boots, this is beginning to help, the salt in the solution draws out moisture from the inflamed sinus and shrinks it apparently!
Im no expert though and it is all trial and error, good luck to you, let me know how it goes, I do understand.