It is doubtful that your stomach is ‘leaking’. Medically it doesn’t make sense. If you had a ‘leak’ in your gastric lining you wouldn’t be comfortably writing these posts.

do you have a diagnosed eating disorder? I’m guessing. Have you seen a gastroenterologist (‘stomach’ doctor)? If not, you need to.
Are you seeing a counselor about your ‘different’ symptoms? Again, if not, you need to get help. It’s out there.