Talk to a lawyer. I know a guy who did that and they upped the obstruction of justice charge from a misdeamenor to a felony.
Your probably not in much trouble. Listen to this story bro, it'll make you feel better. Some idiot I know was driving home drunk and crashed his car into a tree a couple miles from his house. He had 2 ounces of mushrooms and a digital scale in his pocket, and ditched them in a field close by cause he thought the cops were gonna come. So he walks back to his house and reports the car stolen. A hour or so later the cops come knockin on his door. The dumbass answers the door and the cops say they want to bring him in for questioning. They go back to where his car was crashed and see the footprints goint to the field. They follow them, find the mushrooms and scale and arrest him. This was on a Friday, so he had to wait till Mon morning to see a judge. In the mean time, the cops get a warrant to search his house and find 50+ pot plants, a bunch of valiums and vicodins that he ordered online with his credit card, and some bongs/bowls. When all was said and done he got charged with:
-felony obstruction of justice (for lying about the car being stolen)
-felony possession of controlled substance (mushrooms)
-2 felony intent to deliver (mushrooms and weed)
-felony manufacturing of marijuana (the grow room)
-d.u.i.
-driving on a revoked license
-possession of pharmies without a prescription (vicodins/xanax)
-possession of drug paraphanalia (bongs/bowls)
See bro, things really aren't so bad.