So I am 19 and was with my 17 year old girlfriend I was driving home Saturday night when a cop pulled me over for swerving . We were smoking a bowl right before I got pulled over and immidetaly when he walked up to the car he said "we smoking weed here". I said no and he asked me to get out of the car. He asked if I had any knives or anything that could get me in trouble and I gave him my pocket knife and said there was a bowl in the truck. He took it and searched my car but only found the bowl. He gave me a field sobriety test that I thought I did pretty decent on and he then took me in cuffs to the hospital and gave me a blood test. My girlfriend took blame for the bowl and he just took it and set it on his front seat no evidence bag or anything. I also had two beers at 8 clock and it was 12:05 when I got a blood test , do you think that would turn up too? And they said they would try charging me with a dui because they thought I was smoking. Never brought up alcohol once. You think I will get a dui what should I do