Why has the police taken my money amounting to $12,530 dollars when they pulled me over if I had no drugs on me?

I went out for a ride with of couple friends. The police doesn't like my friends and pulled me over stating that I drove over the white line then asked for my license. He told me to step out of the vehicle. My license is valid and I have proof of insurance. He said well can I search your car and I said yes. Then he said even if you say no I still have the consent to do anyways so he started with his canine dog nothing no drugs but $12,000 of my money. I have a job as a stripper. I also get social security. I am 22. I drive a car that's a Chrysler 300 but I only paid $7,000 for my car with ssi lump so the officers told me that they can take my car and that the dog sniff out drugs on my money and that is counterfeit but will be counted it all had lines and I seen all the lines through my money it was real not fake money. They told me to follow them down to the City Hall instead of the police station, locked the doors and have the people who runs the City Hall count my money and then gave me back a receipt that looks like as if I paid my water bill and then told me my money is negotiable. I can get it back and that they can make it go away if I snitched on drug dealers which I don't know who are drug dealers cause I just moved into town. It's May 10th and I've only been there April 16th. Why didn't they arrest me? Why didn't they take me to the police station? Why did they take me to City Hall? Why didn't they take my statement or give me back my money? I don't sell drugs. I don't have a history of it. I don't have a bad criminal background. What do I do? I'm a stripper. Of course we don't have checks. So how do I go about that I didn't have drugs. If getting 12,000 in more than a year is a lot well guess I'm guilty. It took a lot of muscle to shake $12,000 up after rent, food, state to state different clubs of working where is the crime in this?