1. Your not absorbing vitamin D because your liver is all jammed up because bile acid are not being recycle properly resulting in impaired bile flow and emulsification of fat soluable vitamins
2. You may have a potential VDR issue (viral, or pathogens) which is causing vitamin D to feed into the wrong pathway. its possible feeding down the 1,25 vs the 25 OH instead. This will put your body into a pro inflammatory state.
3. Your immune system is probably on fire from what ever stress is going. Elevated cortisol levels may be a false positive because you may have been stressed when the blood was drawn (pissed off at idiots at labs, some asshole cut you off, sight of the needs) 24 hour cortisol saliva is recommended
4. Need proper thyroid evaluation which others mentioned
5. NY depending on what part is a toxic waste dump which due to the evolution of our weakening immune system genetic expressions is being altered which is causing issues in our predisposition on how to get rid of the junk in our system. You are probably on toxic person swimming in a sea of xenoestrogens.
6. Alk phos is representation of possible anemia, low metabolism (adrenal, thyroid), or zinc, magnesium deficeincy.
7. Low SHBG typical 19 year old probably eats like shit all processed foods, loaded with chemicals, if we examined your diet probably carb based. screaming insulin resistance.
8. Been 19 you probably are out partying all night long, and drinking, but know you are playing the piper much earlier in life.
Correct lifestyles, and nutriton would be my number on suggestion...