migraine-type headaches

Hi all. I finished my treatment about 12 years ago for Stage-4 oropharyngeal cancer (HPV16), and have few long-term side effects. Lucky boy, as my wife says. I had my treatment in Tokyo University Hospital, where they gave me 24/7 chemo (three types, second round cut short after anaphylactic shock), and then 35 doses of IMRT. They couldn't operate because the main tumour was too embedded in the back of my throat (how didn't I notice?). Although I can do pretty much everything I want nowadays health-wise, every January and February since returning to the UK some years ago, I get awful headaches. The sides of my head ache, and can be sore to the touch, and inside the head I'm very foggy and fatigued. Plus my face looks like it's being weighed down, my eyes seem to droop and the bags are immense. I've always had cramps at the base of my neck, where the radiation escaped, and this too seems worse at such times. These symptoms definitely correlate with damp/cloudy weather (and I live in the second wettest city in the UK...), and sometimes I get migraine-like auras. Some things do help - 7/8 hours sleep a night, regular exercise, eating well, staying off the booze (-ish). I've tried acupuncture, which worked miracles for my saliva after radiation. It also seems to help with the headaches for some days afterwards, although it completely knocks me out the day I have it. I wanted to ask if others who are years out of treatment get such headaches, and whether they've found things that work for them? I realise this is a small problem compared to the ones that many of you are now facing, but I hope you won't mind my asking. I'm an academic, so the brain not functioning means I'm like a runner with a twisted ankle - not much use and rather whingy. Ta, Mike