need help please

I bumped a lady from behind and i had no insurance... the insurance co. turned it over to a lawyer and the somehow I'm guessing Afni got a hold to it. i never recieved anything from Afni but I know the lawyer's office stated that I owed 571.00 ...when I called and tried to settle 2 weeks ago Afni said my new bill was now 1400.00. They added 900.00 on a year later because the lady was being treated for injuries and the doctors bill wa just resolved. I tried again to set up payments of 50.00 a month for 6 months because I'm pregnant then go to 100.00 but they said I can go ahead and pay but they would try to get my license suspended. What should i do... I guess the irriating part is that the lady i barely touched had no damages to her car and went to the chiropr. 3 times a week.