I personally think that the symptoms you are experiencing is
withdrawal from the
Effexor. You were on a large dose, and it will take quite a time to get it out of your system. If you have read other posts about withdrawal from Effexor, you will see that it is difficult. You could go back and see the doctor about this, or sit it out, and wait to feel better. Some people say it takes quite a time, but in my case, I was on 150mg daily, and did withdraw at once.