Perzactly!
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If you start having any fever, malaise, or increased pain you should see a physician. Occasionally these turn into a middle ear infection. Antibiotics are seldom required.
If you will regularly be diving in fresh water that does not have a current, like lakes and quarries, I would recommend you using ear beer after your dives. That is a 50/50 mix of alcohol and white vinegar. This will help kill bad things that might want to hang out in your ear.
Another rookie's problem is buoyancy. By going up & down like a yo-yo underwater, you are flexing that eardrums quite a bit. The pressure swing would force the water in your waterlogged sinuses to get into your middle ear passages. Another thing that I learnt early was to get the buoyancy set before I proceed on the dive once I get to the bottom, to the point of your body is moving up & down due to only by your breathing, assuming there are no current in the water, not by inflating & deflating your BCD constantly.
You just pour that in your ear? Is this something I should consider doing it now? (I read about alcohol, didn't know about the mix).