What can I do if I was pull over and arrested for no reason then my car was searched?

I was driving with my dog to get some coffee the other morning. I was about to pull into the shopping center when I got a signal to pull over. Since I had no idea what was going on, and I was raised to respect police officers, I did that. Within 30 seconds he yelled at me to get out of the car, I was under arrest. I asked "what for?" He replied I had a warrant in another county I have never had a ticket in. I replied "there is no way I have a warrant." but complied with the officer. Within a minute, I was in hand-cuffs in the cruiser and three detectives searched my car and found narcotic prescription without a label. The entire time in the back of the cruiser, he could not provide information about me having a warrant, nor on his computer did it state I had one. Now they took my cell phone to search to try and give me a trafficking ticket. Along with the possession. Both are felony 4's and I will not only lose my job but my mothers and children’s house. My family knows the prosecutor in said county where I was told I had a warrant (the reason they pulled me over) and I have never in my life had one from there. I even asked the judge when getting bonded out of jail about the warrant and if I needed to go to that county to take care of it. He replied "What warrant?" I have never had a felony, and a couple misdemeanor pot possessions, but those where before I had kids and was in college. I feel I had all my rights as a good citizen clearly taken and missed work and now possibly losing a lot more in life. I am a single father taking care of two kids and my mother.