Caffeine overdose lead to constant dizziness

Age:24 Height:5'6 Weight:230 Gender:Male Meds:N/A smoke: no I had a caffeine induced seizure in 2024 and every day since then i have had constant dizziness ,headaches, ear pain, tinnitus, and when i sleep on the back of my head i get INTENSE migraines. This has ruined my life in many ways i don't care to discuss but i need help and my doctor thinks im completely healthy. I've seen a ENT and they said they can't do anything unless i have explorative surgery which i don't want but at this point i might have to. If you have any clue to what is causing this PLEASE help me.