I understand you may have panicked and been scared to stop because you were in an area you are not used to. You never intended to hit and run. Was the car parked and unoccupied ? That may make a difference. Contact a criminal/ traffic violation defense attorney in your city ASAP and follow the advice you will receive.
A consult with a local criminal defense/traffic attorney would probably be wise.
In seeking an attorney on this site, beware of limiting your search to attorneys with a 10 rating, and carefully read the AVVO disclaimer regarding their rating system. There are certain factors that are given great weight which do not necessarily have any bearing on an attorney's experience, abilities, and results with certain types of cases. Accordingly, the rating numbers can be misleading. Also beware of basing your choice on the fee charged, as a low fee, depending on the skill, experience and determination of the specific attorney handling your case, could actually have an inverse relationship to the amount actually put in your pocket.
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