It may possibly be that the connector to the digitizer was loosened by the contact or it could be that you damaged the digitizer with the contact. I would probably take it to a place for replacement or to check the connection or you can tear it apart yourself. I personally would attempt to do a tear down on it and check the connection first it will save you some money if it is just the connection. But sounds like it is a bad digitizer. It is replaceable you will just need to do some research on finding the part for the replacement.
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Hope this helps....
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Hope this helps.... [https://www.ifixit.com/Store/Parts/Samsung-Galaxy-J3?filters%5BLCDs%5D=on|Samsung j LCD SCREEN REPLACEMENT ]
It may possibly be that the connector to the digitizer was loosened by the contact or it could be that you damaged the digitizer with the contact. I would probably take it to a place for replacement or to check the connection or you can tear it apart yourself. I personally would attempt to do a tear down on it and check the connection first it will save you some money if it is just the connection. But sounds like it is a bad digitizer. It is replaceable you will just need to do some research on finding the part for the replacement.
Hope this helps....