Please I need help. I want my car back.
If the tire is n your name, it's still your car.
Therefore, you can go repossess your car.
If you foolishly signed the title over to her without receiving FULL payment, it's her car.
If the latter is true, your only remedy lies in small claims court.
If it gets to small claims, you'll need to PROVE your assertion that she took the car and failed to pay you.
Even if you do that, you'll still have to collect on your judgment.
Fewer than 5% of judgement holders ever collect $10, much less everything they're owed.
The lesson here, is follow the example of drug dealers and prostitutes.
Get ALL of the money before you deliver the PRODUCT or SERVICE.