I sooo understand! I too feel way more exposed when showing my poetry and art to my T than I do when talking about other personal experiences. My T actually hung a piece of art that i did in his office - I had to face it every time I went there...PAINFUL!
But, please do talk to your T about how you feel, it's very revealing about how you view yourself. You can work on that and maybe get past whatever it is that's in your way. Just be aware, though, sometimes it's our pain that inspires us to create. There may be something deep inside that you are holding onto, are you ready to let it go?
This thing you are about to do is VERY BRAVE indeed!
All the best to you, please let me know how it goes.
HUGS