Distorted hearing

4 days ago my husband fired a gun just as I stepped out on the porch.The porch is covered with a concrete floor,which made the gunshot echo and louder.I was hard of hearing to begin with but I could hear enough to get by on and it wasn't muffled and distorted before the gunshot. Now I can barely hear and what I do hear is muffled and distorted,sounds like everyone is talking with a voice changer including me.I went to the er and they said I have inflammation of the inner ear due to the ear being traumatized.Can inner ear inflammation cause your hearing to be muffled and distorted..And if it does will it clear up once the inner ear is healed.How long will it take to clear up.I was put on prednisone for it but so far it doesn't seem to be helping. Please help...it's driving me crazy..