My 16 year old son keeps getting what he calls "migraines" - start with blurred vision and progress to light sensitivity and then pain. He has been working out a lot and is using pre-work out supplements. He is eating a high protein low carb diet and consuming lots of water. He has dropped 20 lbs (he is 6' 1" and 148 lbs). the headaches don't seem to correlate to anything at this point. His contacts are current. Thoughts?