I have a 2005 Corolla LE, yesterday out of the.

I have a 2005 Corolla LE, yesterday out of the blue the gas pedal wouldn't work. Car started (after a couple tries as usual), put it in reverse to back out of the driveway and it moved slowly, (like it went into gear but that’s it) When I pressed on the gas it stayed at 0 mph, like the gas pedal wasn’t even connected to the engine. When I put in into drive, it again did the same thing but moved forward kind of. My husband pushed me back into the driveway (parking backwards since we couldn't turn it around) and I shut the car off. When I got out I noticed a strong bad smell coming from what I guess was the engine. I then went to get in our other car but realized we put the corolla to far over in front of the garage, so we had to move it. I then turned the corolla back on, put it in drive and it pulled forward just fine and then I could back it up just fine also. It was like nothing ever happened with exception to the smell still being there. The check engine light did turn on during the first episode, and was still on for the second.
History: We have had all the recalls done on this vehicle, including the ECM just recently. I have regular maintenance done every 2500-3000 miles. We just had the oil changed, tires rotated and fluids topped off 2 days ago; nothing was different after the maintenance, car seamed to drive normal. After this happened the first thing we did was check to make sure they didn’t miss something; everything was at the right level. The last few times we brought the corolla in they said the oil level was a little low, so the oil was burning faster than normal but nothing to worry about.
Please let me know if you are aware of anything that could cause this to happen. Also if there is any tests I can do at home to help solve the mystery.
Thank you.