I used to give myself the B12 shots, too. But I switched to 5,000iu of the sublingual Methylcobalamin like you, Bobby. You will excrete excess B12 through your urine so you really can't take too much of it.

If your doctor prescribes your vitamin D, don't change the dose without asking him, because the dose may be based on the level in your blood- and you can take too much of that.

I know you have an appointment with him coming up soon. You can always ask him to check those levels to see if your doses need to be changed.