Can't hear caller on an incoming call, but can on outgoing

Very odd, this morning my phone fell off a shelf in the bathroom, twice. Nothing broke, I counted my blessings. But later I recieved a call and wasn't hear the caller. I returned the call and was able to hear them without any issues, so I thought the first call was just bad reception. But it has continued with other calls and now I am realizing I have an issue.

So to recap, I can hear on outbound calls but not incoming. Hope you guys can help.