I spilt a little bit of water on my computer. But I wiped it off and it is working fine now. What do I need to do?

Define "little bit", and where did you spill it?

Having repaired many laptops over the past years, even small spills that "turn out fine" (for a while) end up often being a creeping disaster if the spill has any significance at all in volume.

Best to turn it off and take it in for full free diagnostic at your local Apple store, however that is your call.

Powering it WHILE wet only compounds problems. 😊