Kelly - There's nothing WRONG with you. Exercise is a habit. One that is difficult to begin. Since surgery my motivation to workout comes in waves. Sometimes I'm very motivated and once I get into it, I don't want to stop. Other times I have NO motiation and can't make myself start. Unfortunately, I'm in one of the "other times" right now.
What I have found in these cycles is that getting started is the key for me. Well that and some form of competition. I tend to be competitive and need some serious accountability.
Try setting up a workout schedule and find someone who will check in with you every day to make sure you've done it. Having a goal helps. Some people make their goal to run a marathon - since I don't run, that doesn't work for me. But something like a massage, or a new pair of earrings might. You have to find what works for you.
I'm going to have to do this myself - starting tomorrow. I have been on this "other time" cycle for the last 3 months and its starting to drive me crazy. So beginning tomorrow - I'm going to do it.
