In your post you seem to indicate that the idea of tapering off didn't come from you, it came from a suggestion from your T. Do you think this may be affecting how you are feeling about it?

I'm in a similar situation at the moment. In my case what I want seems to change daily Part of me wants to go weekly another part of me thinks I don't need to be going at all. At the moment... I want to go to therapy every other week. However at my last session switched to every 3 weeks. *&^%??

I think for me how often I go is not really the underlying issue, it is how the decision is made that is the issue. In my case a simple mention from my T such as "when do you want to come back 2 weeks or 3 weeks?" is immediately interpreted as.. she is subtly telling me I don't need to be here or she is trying to push me out the door. Not wanting to appear like it really matters to me, I obviously say, "I think I will go with 3 weeks." Then these negative thoughts just seem to grow and create anxiety over weeks between sessions.

Maybe as others have suggested if you decide to speak up and request that you return more frequent sessions for a while. See how it goes and get empowered by speaking up for yourself. Then when you are ready decide to taper off again without your T's prompting. I have no idea if this will make a difference or not. As of this moment... this is my game plan for my next session.