The doctor will not call the cops if you have THC in your system. You are an idiot. It is not illegal to have done drugs. It is illegal to possess, distribute, and use.

Ya my dad is a doctor and I know that if he ever told cops anything like that he would lose his license.

its called HIPPA

They might tell you dad though since he basically owns you till your 18. I don't know why they would test for drugs when you have a lump in your throat though... I'm sure its something they could figure out without taking blood or urine samples. I could be wrong though