You seem worried that you may have damaged your ears. One time out like that and it is possible - but not likely. Just make sure you either avoid indoor ranges or double up on protection in the future. My ears are toast. I ruptured an eardrum as a child (infection and it burst from pressure), way too many hours monitoring the radio transceiver/direction equipment while flying (so loud it was physically painful). 36+ years of close proximity with jet and turbine engines. I have hearing loss and constant ringing. Protect what you have, my friend. They only issue you one set of ears.