@curme Good morning
I just read your post and hope I may have something interesting to contribute. I have had headaches 24/7 for the last 15 years. I allow myself two Tylenol 3’s per week, on two different days (anymore and the headaches’ intensity will increase). My neurologist told me to not cut the pills into smaller doses in order to cover more days as she says it is the NUMBER of days when you take the pills and NOT the STRENGTH of the pills that are the factor in the rebound/increased intensity. You say you cut your pills in three. Do you take a smaller dose everyday? If this is the case, perhaps you could try this different protocol. I hope it works for you. Take care.