Clogged ears

Jessica
20 weeks pregnant. So for the last 3 weeks my ears have been really clogged, particularly my left ear. There's been no pain or sign of infection (my doc checked them last week and aside from from "bulging" said they weren't infected). And like I said, no pain but it's annoying because my left ear sounds like it's underwater all the time. 
I've read that it could potentially be from being pregnant and retaining a lot of extra fluid in general and that you just have to stick it out until baby comes.
I was wondering if anyone else has experienced anything like this? If so, did anything help alleviate the issue?