Hello,
Thank you for your query at DoctorSpring.com
Your current set of symptoms are not because of the previous, rather the symptoms of headache, dizziness, fatigue, lack of sleep could all be due to the low vitamin b12 levels.
Why did you stop taking the drug? And what was your level before you started the medicine?
For acidity, you should take a 2 week course of Cap. Omeprazole 20 mg twice daily.
It will be better if you can attach all the reports for me to review.
Regards.