A few of us on here drank a bottle of the Powerade Zeros each day to help combat with headaches.
My IP coach is also my chiropractor so fortunately I just go and get an adjustment to alleviate my headaches.
Also an ice pack directly to the back of the head (at the suboccipital space or the "soft spot") will reduce any headache as well as massaging that space as well to bring more blood flow and oxygen to the area.
A lot of it has to do with electrolyte balance and hormone balancing. So stay hydrated, try the Powerade Zeros or Mio Fit for your water and be patient with the process. It does get better!