First find out do blood test if you are Vit B defficiate don't ignore it start with the suppliments you need to refill it every day .If you are pure vegetarian can continue for long time
Next Steps
Feel free to book my vedio consultation appointment from practo will guide you for sure about suppliment which to take ?doses and all?
Health Tips
till that increase milk and milk products in your diet.If you are non vegetarian can have Eggs,fish,chiken once or twice a week.