I would get a B12 test done.... and see if that shot is "enough".
Some people do better on daily high dose oral therapy, instead of the shots.
Since May... it is not likely to be much if any withdrawal, for short term use, of the Effexor. That is not long enough for the receptors to "change" as they do with antidepressants. Effexor tablets have a very short half life...should be gone in 3-5 days.
The gabapentin can cause confusion and fuzzy thinking all by itself.
__________________
All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
************************************
.
Weezie looking at petunias 8.25.2017
****************************
These forums are for mutual support and information sharing only. The forums are not a substitute for medical advice, diagnosis or treatment provided by a qualified health care provider. Always consult your doctor before trying anything you read here.