I believe you should discuss your concerns in detail with a mental health professional to gain an insight about nature of problem and ways to overcome it through psychotheraputic techniques Consult with me or any psychologist for therapy and counseling Connect with me through practo Follow my Facebook page "juhi parashar -psychotherapist " for mental health issues All the best Seek help for early recovery

Consulting a doctor before taking a multivitamin is not the issue.  Doctor recommend that all adults take one multivitamin daily. Usually a pharmacist or a store that sells vitamins can point you in the right direction. 

You can take vitamin B as it is a harmless medication. However, you should consult a general physician first and get your thyroid levels checked as that can cause the symptoms you are describing. Or it could be just a lifestyle issue, that is, no taking care of yourself. Or there may be underlying depression. But first seek medical help and rule out any physical issues

Forgetfulness could be due to various other reasons.. Consult a psychologist for more clarity and understanding about yourself.

Hi sir Thanks for seeking help here. Vitamin B complex is water soluble. So they does not produce harm in high intake .....if you are a pure vegetarian or occasion non-vegetarian then it's recommended. If want to measure your B12 level, there are tests which can help you. Happy to help you . Regards Practo