Talk to your lawyer about a motion to suppress statements. If you were "in custody" and being questioned by the police then you must be advised of your Miranda rights and waive those rights before the statement can be introduced in court.
Yes statements made prior to Miranda being given can be used for probable cause. A law enforcement officer has the discretion to put whatever he deems appropriate in an arrest report. If you were detained the statements you made prior to Miranda could not be used against you at trial but in a VOP hearing the rules of evidence are relaxed. The best thing you can do at this point is make an appointment with an attorney to assist you with this matter. I wish you the best of luck.
If you find my answer to be helpful or the best answer, please make sure to mark your choice. **COMMUNICATION ON THIS SITE DOES NOT CREATE AN ATTORNEY/CLIENT RELATIONSHIP.**
I need more facts to properly advise you, but if you were being detained, and this becomes a miranda issue, then the admissability of the statement will turn on whether the detention was legal, and secondly, whether your statement was in response to a direct question from law enforcement, or if you made a spontaneous statement. You are in danger of incarceration because of the VOP, so I highly recommend you hire an experenced criminal defense attorney. Good luck.