Ok - on three different occasions you say that it was published and that a magazine requested to publish it. Then you finish with you're not ready to be published.
I'm confused - you're published but not ready to be? Who said you're not ready to be? Do you have your work critiqued? Are they saying you're not ready - if they are tell them to go heave - obviously they're wrong if you've already been published.
If non of the above and it is your inner crittic who is telling you you're not ready, then you may never be. You need to have your work looked at by unbiased individuals who will tell you honestly where it's at. That's not an easy step to make. I understand the concern that you've slaved away over something and don't want a faceless stranger tearing it to pieces.
Trust me - not all your work will be of a publishable standard without another person looking - and commenting - at it. A lot of it you will consider to be good and it'll still get rejected. Critiques help toughen the skin up for that situation too.
Take a deep breath and submit your work to a crit group somewhere - not your friends or family. Work from there. You'll be ready to submit, and be published, in no time.
Good luck
BT