Legal Question in Criminal Law in California

There are ways to withdraw a plea, but "changing your mind" isn't a legal ground to do so. If you were unrepresented at the time of your plea, speak to an attorney about withdrawing the plea. You're right to try and address this BEFORE sentencing. If you had an attorney, bring this to their attention ASAP to discuss the options and trying to file a motion to withdraw your plea.

If you had an attorney and feel that they didn't give you proper advice or left something out and that's why you want to withdraw your plea, contact a different attorney to discuss this.