Deaf in the left

I had a mild cold this last week which luckily past pretty quickly. The only problem is that my left ear has been plugged up over the last few days and it is really hard to hear. There are both advantages and disadvantages to this. The disadvantages: I have to concentrate really hard whenever anyone is talking to me and I always use the phone on my left ear so I have had to change ears which was weird. I never even noticed that I always use my left ear to use the phone. The advantages: I can't hear my husband telling me to pick up my shoes from the other room and getting to use the phrase, "Come again?" when I didn't hear what someone said.