Coins were moved from your wallet. It's obvious since you received change back. This is for you to figure out, from my perspective nothing went wrong. It is still possible you got hacked, but the scenario is pretty convoluted. It would suggest someone got a copy of your wallet, figured out your password, and went through the process of sending you change back, which is unlikely at best.

If you can't figure it out, try harder, or start looking at people in your entourage. It is entirely easier to for someone with physical access to your computer to drain your wallet than some random hacker online gaining access to it remotely.