Hi I am 15 years old and I've been experiencing headaches my stomach hurts loss of appetite weakness when I get up I've been feeling really tired and loss of energy and I don't know what to do I don't know if it's something I should be really cautious of I tried working out because I have gained some weight to see that would help but all it does it makes me feel so dizzy and when I eat it I just go to the restroom right after and I'm never hungry can someone please help me I don't know what's wrong?