What could I do if my car was impounded?

I had just bought this car from a tow yard and it had a lien package. I was going to get the registration and plates for it the day that my boyfriend got pulled over after he had just picked me up from lunch. I was in the car. Apparently the officer asked me if I knew my boyfriend had a suspended license (although I wasn't really paying attention because I was already late back to work) and I replied yes. The officer gave me a ticket for allowing an unlicensed driver to drive my vehicle and a ticket to my boyfriend for driving on a suspended license, and having no insurance (my car had insurance on it). Then the tow truck came and impounded my car and I was told that I could get it after 30 days (the cost would be 1700 and something). I called the sheriff’s department to have a hearing to release my car earlier. I was told as well as my boyfriend that if he got his license and brought it in and showed the sheriff then she would release my car that day. Unfortunately his fines which were in 2000 to I think 2012 (before I had met him) cost way too much for us to pay for. Before the sheriff said for my boyfriend to get his license I told her that I wasn't paying attention when the officer asked me if I knew my boyfriend had a suspended license. I thought he asked if I knew that the expiration date was up because that all I thought he had. The sheriff said that they had me on tape (which I don't know how, the officer came up to my car) He had a license and I just assumed that it was valid because "he still had it." First why was my car impounded for 30 days even though I do have a valid driver’s license and secondly how can they even impound my car when I did not know that it was suspended (even though they said that I said yes that I knew). How can I get help? I just bought the car for 1100.00 and I am a single mother working two jobs and going to school and supposed to get my daughter during the week (now I don’t know how I am going to do that).