Im falling apart at 19

Hi. M19. Ive moved away from family and long way from home, and am living almost fully alone for the first time in my life.

Ive encountered a problem, wherein i, for some reason, cannot bring myself to take care of my general health and hygiene.

Sleep schedule is in ruins, showers have gone down from once every 2 days to less than once a week. My beard and hair is overgrown, nails, teeth unbrushed for days on end, sections of the room filled with trash, living off processed and junk food primarily, no veggies and only 6-7 fruits in 2-3 past months, backpain, lack of excercise, skin damage,holed up in my room, lackluster studying, etc.

Ive never had health problems before, and have always been fairly hygienic, tidy and orderly, but following a trend from the past few years I feel like im slowly crumbling and cant change course. At the age of 19 im experiencing physical deterioration at a rate i have never before.

I dont know whats gotten into me, but its just like i cant make myself do anything anymore. The way im treating myself and my body, in a foreign land with no family to rely on, im worried if i cant manage to get back on track in time ill pay a heavy price for it in the coming years.

Id appreciate any adult advice, from people who have been in this predicament before, or have had problems with self regulation on how to manage alone