Very doubtful your "probation will extend". Too much water under the bridge. You will in all likelihood be taken into custody. retain counsel or get a PD when you appear. Delay will only worsen the situation.
DO NOT DELAY. Meet with an attorney asap to review your criminal record, your open cases/warrants, and your probation matters. While anything is possible, you will likely be brought into custody...
Chris Malcolm -- 617.645.0089
I agree that you need to take care of these warrants as quickly as possible. What happens with your probation depends a lot on your record and your present ability to make restitution (if you haven't already done so), but walking in on these warrants or getting a lawyer to assist you in answering them will go a long way toward making the best argument to the court that you should get another chance or avoid incarceration. Even if you can't afford an attorney you probably have a good shot of qualifying for a court appointed attorney and you shouldn't delay trying to take care of this. Good luck.
This answer is for general information purposes only and should not be relied on as legal advice, nor does it create an attorney-client relationship.