If you're in the market for a chiro I would recommend someone who uses Sacro-Occipital Technique (SOT), Total Body Management (TBM) or Applied Kinesiology (AK) as these techniques are generally the gentlest. Someone who does cranial adjustments may also help as I know when I get a headache which sounds similar to what you've described, I know my "brainbox" is out of shape!

My dad's a chiropractor and I'm probably bias, but he's THE BEST! A few people we know in Melbourne (including me of course!) reckon he's worth the drive to Daylesford for treatment. Cheaper than city chiros too! But probably not once you factor in the petrol prices