OCD or ADD

I do obsess about many things. They tend to be random though. I will get my mind set on something and try to stick to some kind of plan. It does not always work out. I make lists and lose the lists. I start a project and wander off to something new in minutes. For example, last night I started filling the dishwasher and washing dishes. In the middle of rinsing dishes, I realized I had not washed Chris' sweaters so I left the dishwasher open, ran downstairs, put the sweaters in the wash and then came upstairs and started planning dinner. As I was thinking about dinner, I turned around and started the dishes again.
Chris came home and somehow took over the dishes while I talked excessively and wandered around the kitchen. He asked if I finished emptying the front closet. Oops, that was supposed to be on my list of things to do yesterday. I just shrugged it off and said I would do it another day. How can I be so obsessed about getting the house ready for the baby and just organized in general, yet my attention span is like a goldish and I can't put it all together? The only good thing is that Chris and I work very well under pressure. It will all get done, but I wish I was better with the planning.
My problem may have something to do with the fact that I am in the final trimester and I can't imagine what life is going to be like in the next few months. Our registry is done, I guess. There are a few things to add, but overall I need to stop. We have no baby furniture yet. I don't even know what we want. I signed up for birthing class yesterday and that was a reality check. Six months before our due date, we have a six hour class to attend. I read about birthing plans and thought it would be a simple task, but I don't even know what half of the questions meant. Oh, and I have my glucoes test on Friday along with a check-up. The list of questions for my doctor keeps growing. AGH!!!! Is it ok for a prego to explode?