I feel like allergies are a major contributor to my CH. My cycles are always around some kind of allergy season - but they have been somewhat inconsistent in start date depending on location I am in. I had 2 years starting Oct 15th in Tampa FL area, then July 4th (skipped a year somehow) Move to Gainesville FL with July 4th, then Feb 13th last year and this year I just started April 19th. The times I have had them in the summer time I have had a much lighter schedule of attacks.
I can't find any good sources for which particular pollens are in season during the times, but I typically always get some kind of sinus infection along with the attacks. I have never smoked and don't drink. I am very habitual as well, so the only trigger that seams plausible is allergy related. I feel like there has to be a trigger since my start times are not as consistent as other peoples. I want to have kids in the next year or two, but do not want to be pregnant and having attacks. Need to figure out how to time pregnancies around CH.
Contemplating allergy treatments to see if it has any effect on my CH but not looking forward to more big medical related bills.