Hi.
Thanks for your query.
Noted the history and understood the concerns.
The symptoms of feeling like eating over and again in spite of full diet and normal sugar and thyroid indicate one of the reasons:
Anxiety, Depression, Certain drugs,
Diabetes mellitus, Hyperthyroidism
Hypoglycemia, Fatigue,
Premenstrual syndrome, Prader–Willi syndrome
Bulimia, Graves' disease, Kleine–Levin syndrome and so on.
I would advise you the following in such a situation:
Consult your Doctor and discuss about all the disorders mentioned above and get a clinical evaluation, examination and investigations to find out the cause.
If all the things are normal
consult a Psychiatrist for evaluation and management.
Upper GI Endoscopy to see for the esophagitis, acidity related problems,
hiatus hernia and so on and get treated accordingly.
This is most probably a case of bulimia.