No reason to be uneasy, just alert. With a tight sprocket, the pedals have a few degrees of backlash an the chain tension transfers from the upper to lower loop. Once you're familiar with how far that is, be aware if it increases. Any change from normal means trouble. It could be that your wheel shifted or the sprocket is loose.

BTW- riding a fixed wheel for decades I long ago developed my system for tightening the sprocket. Since there was no steep hill near my home, I'd mount the bike, roll until my front wheel touched the wall, set the pedals horizontal, then hop on and try to ride through the wall. Afterward, I'd set the lockring.

Using that method I've never had a sprocket come loose.