Hair mineral analysis is much more accurate because it shows what is actually absorbed into your tissues and cells which include the hair. You can have high levels of anything in your blood but low absorption so it does not get into the cells/tissue which is where it has the real effect.
In general when massive changes happen to a person all of a sudden my first guess would be parasites.
Our bodies go into 3 8-hour phases in a 24 hr period. During the time 4am until noon your body is detoxifying so when your eat cooked food the detoxification comes to a hault because your body has to work to create enzymes. If you eat raw food until noon (fruits, veggies like carrots,cucumber,tomatoes,romaine or any others) you are not getting away of your body detoxing. This won't fix the problem but it would help slow it down.