I was recently arrested last night for drug possession and paraphernalia in the city of Rockford, IL. This occurred during midnight when a cop was hovering the back of my friend's car, as I was not driving, and was noticing a light being out on his back license plate. However, he also spotted this other friend of mine in the back seat trying to stuff something into the seat. So when we were pulled over, he asked us for all of our IDs. He then questioned everyone to see if they had anything on them that they shouldn't of, pulling out the friend that was in the back seat first, admitting to having marijuana in his possession. More of it was also found in his shoe while he was searched.
My other friend, the one that was driving, was then pulled out for questioning. As this occurred, I was also asked to come out of the vehicle. The officer asked me if I had anything on me that I shouldn't of and I said that I had marijuana, which got me in cuffs. I was not read my Miranda rights. My friend's car was searched and they found some roaches, which was placed in there by the guy in the back. We were both placed into the back of the police car until a van arrived, taking us to the jail of Winnebago County. I was finger printed, mug shot, and I also posted a $115 bond. On the bail bond, it states that I am to appear on August 28th of this month.
To get to the point: This is my first drug offense. Will there be a chance of me receiving a 24 month probation, along with the $1500 fine for marijuana possession and the $750 minimum fine for paraphernalia possession, or will I be sent to jail after I go to court? I would also like to know if these charges have a chance of getting expunged.
Thank you.

