Eat at regular intervals as you are now doing. Take
Omeprazole empty stomach in morning
and an antacid gel at bedtime. Refrain from smoking, alcohol, fuzzy drinks, caffeine, and spicy food. See if this helps. Also get your BP checked to see if it is not too high or too low. It can also be stress and lack of proper sleep. If it does not then you will have to consult a doctor to run tests to rule out thyroid problems, ear problems, pinched cervical spinal nerves, epilepsies, heart problems, etc.