suffering from gastritis and Fatigue feeling throughout the day

I am 34 yrs male. I was diagnosed with Gastritis (endoscopy) 6 months back. Since then i have burning sensation in the stomach area (under my left ribs). I get hunger pangs 3-4 hrs after eating food. My stomach makes gurgling sounds when i have hunger pangs. In the night i wake up suddenly and cannot sleep after that. Once i wake up i keep having hunger pangs and i keep passing gas.
I dont have difficulty eating food. In fact my appetite is good. But once i eat my stomach bloats and i belch very often. Due to the bloating i dont have a smooth breathing. It looks as if i am breathing with effort.
I have this weak/fatigue feeling through out the day. I have this feeling that i am not well.
I have problems with sleep. I sleep at 10 pm in night and suddenly i wake up for no reason by 3 am in night. Then after that i get growling sounds in stomach or abdomen and i feel very hungry. Some times i sweat in night and i feel anxious (dizziness).
I got my glucose toleranace test (GTT) done as per the recommendation of a allopathic doctor. They found that my insulin secretion is higher than normal which is causing my glucose levels to crash after 3-4 hrs of eating (post pardinal hypoglycemia). Because of which i have this hypoglycemic symptoms. The doctor advised me to take some food every 3 hrs. He advised to take diet rich in fiber. I started getting this symptoms from the time i was having gastric problem.
I tried some allopathic medicines, initially they helped me with acidity but i had bad side effects. Then i tried ayurvedic medicines that also gave some relief but the heaviness in head, pain at the back of eyes and brain fog and weakness are not gone. So one of my friends asked me to try homeopathy which he said will work. So, right now i was advised to take 2 pills of Noxocid and 2 pills of Bio-combination 25 i hr after food. I feel with acidity thing but my sleep problems and hunger problems are still there.