So here's a new one..anyone ever have this in your pregnancy?

So I woke up yesterday and my left ear is muffled and ringing. It sounds and feels like I was at a rock concert that was way to loud. It was driving me nuts today being a choir teacher and not being able to hear...not fun. I know i'm only 7 days DPO and dont really expect any symptoms. I was surprised when I did some research and found it is a pregnancy symptom. Apparently something with hormones causing excess fluid in the body and in the ear. I'm not jumping to any conclusions but it is interesting. Anyone else who has been pregnant ever have this?