Is 2.5 year probation for a fifth degree controlled substance charge a good deal?

I got pulled over. They thought I was under the Influence of a narcotic because of what they say as meth scabs. I was in a fire, almost died in it. The meth scabs were my skin grafts healing. They searched my vehicle, and found some drugs that I took away from a friend who relapsed that night. When they brought me to jail, they took a blood sample. It would've come back clean if they would've gotten enough blood to test. They offered me 2.5 year probation when this is the only time I've ever gotten into trouble other than traffic.