@effexorhead, I add my welcome to @scolio's. I moved your post to this existing discussion:

- Coming Off Effexor: How long can I expect symptoms to last? https://connect.mayoclinic.org/discussion/coming-of-effexor/

I did this so you can connect with others. You may also be interested in this discussion:
As promised, my successful tapering off Effexor (Venlafaxine) https://connect.mayoclinic.org/discussion/as-promised-my-successful-tapering-off-effexor-venlafaxine/

I'm trying to understand your timeline. Are you saying that you took Effexor 150mg 2x daily for 9 years and 4 weeks ago you stopped completely and your taper was only 6 days long? Is that correct?