You should retain counsel and discuss the matter. You haven't indicated which substance you were allegedly trafficking, whether or not it was in a school zone or in the vicinity of a juvenile. In general, second degree felonies can carry from 2 to 8 years however there can be presumptions of time, mandatory time and enhancements depending on your conduct.
You are facing mandatory prison time of at least 2 to 8 years in prison.
I wish you the best. If you would like a free consultation please contact my law firm, we can be reached at (440) 471-7784 and after normal business hours at (216) 288-0792. We routinely handle case such as yours and are more than willing to help.