As your agent explained to you at the start of the short sale process, there are many parties involved. Many of them have invested time, resources and money to move the process to it's current status. Much of what takes place regarding a short sale in invisible to the buyer and seller. That does not mean nothing has happened.
Your agent should hold you responsible for the costs already incurred. There is little doubt you will be released from your existing listing contract.
Of urgent concern to you is addressing the HOA. They have SUPER LIEN status and can take the home. You may want to keep your agent on your team to bring resources into play to address this issue.
Yes, you can change your mind. There will be consequences that could come from your agent, the agents broker, short sale negotiator/, the HOA, and others yet to be identified.
Short sales are a process that requires trust. You seem to have lost trust in your REALTOR. It is unknown if this lack of trust originated with the REALTOR or from your action. You would be well advised to consult with your REALTOR, discuss your intention, address the current distress and together, plot the best exit strategy and course.
Best of success,
Annette Lawrence, Broker/Associate
Remax Realtec Group
Palm Harbor, FL
Palm Harbor University High School distirct