Engine oil

I topped up my engine oil the other day and did not screw the cap properly. The next day it exploded and got oil all over the place. I washed the engine bay with a water hose (not sure if that is enough), made sure car got enough oil and screwed the cap back on. The next day the car was not driving properly, like it was struggling for power. It will not go as hard when i press on the gas pedal. It will struggle for a bit and then go. I was wondering if the oil got into the spark plugs and messed it up? Can someone please help i dont know if this is serious or not thank you!