Age 51. From navi mumbai suffering from b12 deficiency. It?s at very low level at 48. Started taking myco supplements of b12 myco 1500 and also took 8 injections on alternate days of 500 mcg from last 15 days. Kindly advise how many more injections and medications to be taken to get to normal level I am still not having balance while walking. I feel will fall down. I have gastric problems. And no other disease or medical conditions. My weight is 72 kg. I had migraines often and had taken too many pills of nice as painkillers gastric problem might be the reason for deficiency I feel also when I take medicine and injections my palpitations increases and I cannot sleep at night kindly advise. I also get pain in ribs near chest when I sleep sideways.