Answer: in regards to whether you are facing jail time, the answer is “yes,” at least on the probation violation. The amount of time is variable but far less than four years. With respect to your open case, it could be a year or more, depending on what was actually charged against you. However, more information would be needed before a more definitive answer could be given.
I would suggest you contact an experienced criminal defense attorney who is local to the court where your matters are pending, and further, who has handled these types of matters before, as not only will they present you with options as to your open case, but they may have a better idea as to what the specific judge has done in terms of sentencing on these types of violations in the past.