Im 18 about to be 19, and for the past year or so i haven't felt hungry. I'll know that i have to eat cus I'll hear my stomach basically shouting at me to eat. I have depression, but I've had it longer than I haven't felt hungry. Also, I'm constantly tired, and i get winded doing simple things like walking up the stairs. I'm 6'1", and 186 lbs. Should i be concerned?