I accidentally missed a few days of my 150mg Effexor XR dose. I started experiencing severe withdrawal symptoms, the worst being dizziness & lightheadedness, also GI issues. I took my 150mg pill a couple hours ago but I still have the withdrawal symptoms & they hardly seem to be getting better. I'm sure it's not safe to take another 150mg capsule but I can't even cut them in half or anything since they're the extended release. What should I do? I'm pretty desperate to get rid of the withdrawal symptoms.