Does anyone else have this problem?

So far I have talked myself out of doing yoga (which helps me) and taking meds (which are also helping). I became much more angry, anxious, and stressed out when I stopped. I have started doing both again but I wonder what it was that made me decide to stop? Is there some part of me that wants me to be miserable?

Then there are other things, on a regular basis, that I talk myself out of doing, things that would help me. For example, finishing an online course, buying vitamin supplements that my doctor suggested, making time to meditate. I want to do them but I tell myself it is pointless, why bother, it will be a waste of my time. And I listen to that voice even though I know it is wrong.