Conspiracy To Sell Without Possession.

The security at my college have intercepted txt messages related to fake drug sales. The story is a long one, but suffice it to say, I've never sold drugs. They intend to release said messages to the local authorities. If the substance in question was marijuana and the ammount was a gram, and this would be my first offense, what charges could I expect to face?

I also have no drugs in my possession, or anything illegal for that matter. I am only 17 years old. Can charges of conspiracy to sell really stick to me?