Can police give me a DUI with no alcohol or drugs in my system?

I am currently 2 months pregnant. I was feeling ill and I felt like I was passing out. My cell phone was completely dead and I live right behind a hospital. I got into my car and I drove to the hospital. As I entered the emergency room parking lot, I completely passed out hitting the guard rail to the hospital. The police arrived because there was an accident and I was given a DUI using drugs and alcohol or both. I asked the officer how he was giving me a DUI and he simply stated because my license was revoked for a previous DUI and it is what he felt I was. I then asked him if he was going to arrest me and he told me no, so I asked him to leave my room. I had the hospital take a full toxicology using my blood and do an alcohol test, all test came back negative. In my report, the officer gave me possession of drug paraphernalia because he found a pipe and herbs in my car. They were not any type of illegal herbs and they were actually my bother's who used my car earlier that day. It was an herbal incense, I understand what spice is and mamba all that, it was not any of that, no illegal chemicals were sprayed on the herbs. All of my test came back that there was absolutely no drugs or alcohol in my blood. I also refused to do anything for the cops based on how they were profiling me and telling me that I was already in trouble for previous DUI. I called the DMV 5 days later to see if they had a hold on my license and nothing was filed with them. Can they get me with a DUI seeing that all my reports came back negative for anything illegal and if I refused why is there nothing filed with the DMV?