I shared a secret because it was eating me alive. Have I messed up?
Why did you feel the need to tell your secret?
I just had to say something. It was torturing me inside, I wanted to throw up all the time.
If a secret is really eating away at you that badly then it's only natural for you to need to tell someone. If it's problematical, you should consult a counselor so you can feel free to share your feeling without suffering repercussions.
I am a good judge of character and it's clearly fine. I don't think I'll regret it.
I am glad you realize the effect keeping secrets is having on you. I think you will feel better after you tell someone the truth.