B2, B9, B12, scurvy (vitamin C), iron deficiency, or zinc deficiency
Sice there's 3 vitamin Bs listed, a vitamin B complex could cover them all if you're not sure if you have one or the other.
UPDATE: I switched from a coenzyme B Complex vitamin to a coenzyme B12 (without the other B vitamins because the Niacin or B3 was causing a fast heart rate. I don't find the new vitamin to help as much. Could it just be the lower quality brand or could I be lacking morw than one B vitamin? So, I'm going to buy another coenzyme B Complex vitamin with half the amount of Niacin (50 mg instead of 100mg).
Yes, I just tried another brand of coenzyme B Complex vitamin. I works just as well without the fast heart rate. Therefore, I recommend the B Complex over B12 alone. However, the B12 vitamin was a dissolve in your mouth type of vitamin so that could be the problem.