Hi, I Am Experiencing Certain Symptoms Which I Think Is

Hi,

I am experiencing certain symptoms which i think is not right. Often faint, dizziness, vomiting daily in morning, sudden weight loss, shivering, headache, not hungry, nausea, sudden allergy from milk its not digestible. Stressed and can't sleep.
Can u please help me out to figure out what i should do?
i consulted a doctor he gave me medicines but the weakness is just the same though i am also eating properly.