I was taken off wellbutrin last Sunday because of a mix up with the pharmacy and insurance. I am feeling the same thing you described and lower and lower each day. I am going back on in 2 weeks but I am amazed how much my system seems to need it to function. My doctor and I didn't think the dose was high enough to be doing anything but now I have no energy, my brain feels wrapped in a wet towel, can't focus, and have started crying at everything. I wouldn't recommend self medicating without calling your dr and at least giving them a heads up though. Hope it works out for you.