Constant Nausea Loss Of Apetite 21 Year Old Male, Constant Nausea, Loss Of Apetite, Tiredness?

21 year old male, Constant Nausea, Loss of apetite, Tiredness? - constant nausea loss of apetite

21 years in the one form. i in the last two months, the feeling, nausea, which lasts throughout the day have, I have a small appetite (loss of more than 15 pounds during that period of two months) and tired and often dizyness. I checked my heart (EKG and ultrasound), I had an MRI of my brain ... all types of blood tests was a little different doctors and none of them can solve it. the only body part that is not yet verified the stomach, then I will Gastrology in the coming days. No idea what could be? in Desprat preserved.