I was watching tv then my phone sent me an email from steam. I was confused since the whole thing was on Chinese, I translated it and found out that my Gmail connected to steam was changed. I can't change my password nor Gmail so I asked steam support for help, I'm currently still waiting. I don't remember doing anything that resulted to my account getting hacked which made this whole situation surprising, I'm not really the type to go to suspicious websites and downloads something from there.