What will happen if blood turned out negative for my DUI case?

Anyways I received this DUI charge back in August 2013 and am headed back to court for a seventh time after my last continuance. Anyway, I was headed home from my lunch break when I drank a couple of beers the night before and left the beer bottles in my car. I also had inhalants that were my friend's also called "whippets" in my vehicle in which I had done the night prior. I also had taken my prescription Xanax anxiety medication that morning. I took only 1 mg total or two pills. I cranked up the AC and ate my lunch and then headed back home after receiving a text from my Mom that I got a package in the mail. I was then headed home to check in with my Mom and when I was headed home I realized I was a few minutes late from work so I started speeding down Duncan road and passed two other vehicles and as I was turning into my neighborhood I veered off the road, lost control of the car and struck a tree at 50 mph. I blacked out for a second and felt really light headed and in a daze or shock. But I was conscious and still able to communicate with the officers. I was in a lot of shock and was just agreeing with everything the officer was telling me because I was in complete shock and didn't want to cause further issuses with the officers after totaling my brand new $33,000 car. I had said I smoked cannabis the night prior but it didn't affect my driving. The officer asked me if the whippets affected my driving and I said "Um yeah, yeah definitely." In the police report it was stated that the beer bottles felt cold to the touch and had suds on the top. The Police, Fire Fighters and Ambulance got there. The officer gave me the option of going with him to the station or going to the emergency room for my broken nose. I chose the emergency room. The paramedics pricked my finger and put me in the vehicle.