No you shouldn't worry really. Some X's burn more oil then others... I have to top mine off every now and again...In fact I just did this morning with half a bottle. The sensor is sensitive and thats to give you plenty of ample warning to let you know before its too late. Most cars when that warning shows up its pretty much at a critical level... From my experience, ours cars will let you know sooner.

Don't worry about it unless after a few days or couple weeks the warning light comes back again. it shouldn't come back for a while, I'm talking a couple months or more, you'll probably have an oil change by that time anyway.