I think I got hacked please help [launcher]

How do I get my Microsoft account back?,

I was playing Minecraft at night and went to bed. I woke up the next morning and wanted to play, it had signed me out. I thought it was no big deal and tried to sign in again.

"This account cannot be found" crap. I thought okay maybe my email was wrong.
No I only use one email and one password,I tried making a new Microsoft account but would have to buy Minecraft again.
I will not be doing that, so reddit how do I get my account back? I honestly don't know what to do. I did go online to hypixel for the first time and did meet someone.
I think they did something?