Hi. I got episodic tension headaches for 18 years now. I am 30. I get 6-8 per month. My headache patterns have changed. I noticed once in a while headaches will wake me from sleep or return later in the day after taking medication. Advil is the ONLY thing that works. As I hate being on Advil so much, I have tried chiropractors, stim machines, preventative meds and shots, hydration, eyeglasses, etc. I am now onto acupuncture. I have had 3 appointments in the past 9 days (recommended to be 2x week). I have had 2 headaches since. How long does acupuncture take to work for headaches? Thanks.