I'm a 17 year old male with these systoms:( help me please, they called me to stop going to school and quitting all sports

Pain in stomach(sharp pain) chest(a pressuring pain causing it hard to breath) and back( an aching feeling that goes on and off every second)
Blood in stools
Either Diarrhea or constipated
Having to go to rest room right after eating
Stressed,anxiety,depressed, anti social,short temper,never wanting to leave home. Not good with loud sounds or big crowds
Heart burns hours through out the day
Sweat while sleep
Eyes hurt to light
Weight loss (20-30 pounds) can't keep weight on
Vomiting weekly
No appreciate or Full after I eat just a little amount of food
Head aches daily
Always tired with no energy
Burping a lot, very gassy
Vomiting immediately after taking any medication