I would really consult a doctor about this. The most concerning part to me is that you’re taking multivitamin complexes and could be damaging your body even though you don’t think you are. I don’t know the specific dosages in your multivitamin but if you’re taking ten a day, I’d assume thats five or more times the daily recommended dose. Even if thiamin overdose is not what you’re afraid of, there’s plenty of evidence of toxicity in other B vitamins in large doses. Your liver is not built to metabolize vitamin doses this high this fast. If you continue this regimen long term, you’re seriously increasing your risk of liver toxicity which would have detrimental impacts on your health. I know that this seems like the best solution right now but please consider your safety and talk to a doctor before continuing this.