You did not include the conditions and sentence on your first DUI charge. Without knowing that it is no possible to give you a good picture of what to expect. Also, it would be important to know if you are going to be completing ASAP by your next court date. However, you most likely have suspended jail time and possibly suspended costs from the conviction. My best advice is to hire an attorney to come to court with you; having an attorney who knows the judge/commonwealth/system could be the difference between receiving part or all of your suspended time and obtaining a dismissal of the show cause.
Perhaps you should call around a bit more. This type of issue could be handled for less than 1500 depending on the attorney, their schedule, ect.
Good luck and congratuations on you sobriety.
[Note: Consistent with Avvo policy, this communication is intended as general information and not specific legal advice, and this communication does not create an attorney-client relationship.]
A roundup of the best tips and legal advice.