Will I be able to get my DUI case overturned?

I was heading to my girlfriends house, and got stopped by a red light. Once the light turned green, the Officer behind me turned on his blue lights. I immediately pulled over, and the officer comes to my window and asks for license and registration. When I hand them to him, he tells me to step out of the vehicle. After he checks my pockets and finds nothing, he forcefully ask me (multiple times) where my marijuana was. After realizing I had no choice but to tell him, I finally gave in and told him. Once he comes back to the back of my truck, where he left me standing, I asked him what I had done to be pulled over. He responded "You had a tag light out and I couldn't see your tag." So, I immediately look down and point out that both tag lights were on and working. (My truck was still running) His response "Well, it wasn't back there. And you got kind of close to the yellow line back there in the sharp turn, I have video if you would like to see it." I told him that I would like to see it. And he immediately starts giving me instructions for a field sobriety test. He originally started the "keep your head still, but follow my finger with your eyes" test facing his patrol car, but after moving his finger across my eyesight twice he made me go sit on the front of his car looking away from the camera. After coming to the conclusion I was "high as a kite" and couldn't "safely" operate a vehicle he placed me under arrest. The officer then proceeded to tell my girlfriend he made the stop for "reckless driving" but it wasn't until he returned to his patrol car that he told me I was "swerving all over the road, and he wasn't afraid to show me the evidence." This stop happened after 12 AM on the morning of Thanksgiving. Other than me and the patrol car, there was little to no traffic whatsoever on the road. I was apparently sober enough not to speed through a traffic zone (without cruise control, as my truck doesn't have that feature).