How can I track a speeding ticket that I had to pay in order to renew my license, BUT NEVER EVEN GOT??

I live in NH and when I recently went to renew my license, they said I have an outstanding ticket in Massachusetts and had to clear that before they could renew my license. I called Mass DMV and they say I had a speeding ticket issued June 2010 for $220 with a $100 reinstatement fee.........I absolutely DID NOT!!! I had to pay it to renew my NH drivers license, so now how can I find out where this ticket came from?? ............. Thanks, Frustrated!!