Question about a legal situation for a 15 year old?

I am already on probation for drugs, can I go to jail now, I pulled a knife on another kid for snitching on me about something else, could I go to jail for assault? I also got in a fight with a few people a week ago over a few dollars that they owe me, and yesterday I beat someone up cuz they called me a porch monkey and I just snapped, I told my P.O she said she would try her best and see what she can do to help well I didn't tell er bout the knife thing but the dude is the biggest snitch round here so I afraid he will go straight to the police and have me arrested then, would any of this put me in jail? If so for how long? I live in Manhattan New York