Disqualified from driving for being uninsured,and misinformed by police officer?

i was recently stopped and found to be driving without insurance as i mistakenly thought my policy allowed me to drive other cars, the police officer offered me an on the spot fine of �200 and 6points or the option of going to court, where she said i may get disqualified. i thought 6points was an instant ban anyway as i've only had my licence 18months but she said any more than 6 and i'd lose my licence, so i accepted the fine and points but have since found that i was right and i will lose my licence. i've been told that i should have gone to court as i'm 27 got a totally clean licence and could have got away with less points. what is the likelihood that a court would have let me keeo my licence and is there anything i can do now?