drove through high water

I drove through high water a month ago. The car did not shut off. I did notice white smoke. Next day I took the vehicle for an oil change and an air filter change. Car ran fine. Now, a month later, I had a rough idle at a traffic light and blinking check engine light. I was three minutes from my driveway. I smelled gas when I turned off the car. no smoke from the exhaust. Could this be related to driving through the water?