This kind of thing happens - head pain, etc - when you activate dormant chakras, and as a result of psychic development. It usually does not last long and is a good sign.

When anything 'big' like this happens, apply The Golden Rule, which is, to take a break until you feel completely normal again, then go back to what you were doing. The break can be an hour, a day, or a year...whatever is needed.

robert