Awhile back my lil man had a reaction to a bug bite and his hand swelled up. so we sat in the e.r. for 2 1/2 hrs just for them to give him baby Benadryl. Now he's been bitten on his eye brow and it's swelling up. Should I just give him a lil baby Benadryl or sit in the e.r. for another 2 1/2 hrs?