Could I take my car even though my mom says no?

I have recently moved out of my mother's house. I'm 19. My mom gave me her car since she got another one. I pay the car payments but she pays the insurance, but she expects me to pay all the month’s payments at once and it is getting frustrating to deal with as I am on my own now. we moved the insurance over to my name and I'm not sure exactly what the title name is but every paper I need for my car is in my name (not educated on car titles). Am I able to just say no and pay for it on my own or could she legally take the car from me?