Well, from the way you write, you are intelligent enough, so no worries there. However, you do have a problem. The last depressive episode that I had, it seemed as if anything that I tried to do relied, somehow, on something else needing to be done, and my thoughts would just go round and round, and I was just unable to act. Unable to make plans, which, as I was involved in moving house, quickly became a nightmare. Fortunately, this phase is now in the past. I found that keeping things as simple as possible, and writing down what I wanted to achieve, and how, helped me through a tough time. Talking to a professional is your next, obvious move, if that is why you feel you should do, but know you are far from being alone in this!