I've self diagnosed myself as being b12 deficient.It started with tingling in the arms, loss of balance, brain fog, fatigue etc. Those have since cleared up but I've developed other symptoms. My levels were about 270 before starting supplementation. I've been taking between 250mcg - 500mcg of methyl sublingual b12 each day for a month, and for the past few weeks I've had to switch that to only every second day because taking b12 every day would cause changes in my thinking, hyperawareness and sensory (like being able to smell 10x better than I usually do). For the past 8 weeks I've also had 1 x hydro b12 injection every 7 days in addition to the sublinguals. However, at night, from about 8pm - 2am, any time within that range, I feel really out of it, and have neck and/or arm weakness, and tingling in my body and general confusion. Especially when I'm trying to sleep, it's really scary. One night, I only had just enough energy to turn on my lamp next time my bed. I try to change positions and I've even started using a U-pillow, but I don't know how much it helps. The tingling usually goes away after 2am and by the morning I usually don't have weakness anymore (but sometimes have other symptoms like nausea, shakiness, but that resolves itself after I eat breakfast). I've also been taking 2 x 100mg of magnesium (amino acid chelated) - once in the morning and once at night. For the past few days I've tried to up my potassium balance by drinking a can of coconut juice each day, and two bananas, as well as a baked potato here and there. I feel that has helped, but I don't feel 100% just yet. I feel like I'm having more better days than bad days recently. I think it takes time for the body to heal. My question is, why do I get the tinglyness/weakness at that time of night? And not during the day? Is that because the body is creating new cells, or repairing the damage or the nerves are waking up? Or is it a result of potassium being used up? Thank you in advance. It's good to know I'm not alone in the fight against b12 deficiency, especially as drs only know the most basic b12 facts, and don't take seriously how vitamins work in the body, and how much damage the lack of one vitamin can do.