I think I've been hacked and that I may have a keylogger on my PC.

Hello, today I attempted to log in to my reddit account only to find I couldn't because the password or email was incorrect. I attempted to reset the password but I wasn't getting a password reset link to my email, that's when I noticed that there was a notification about my password being changed but there was no prior email that had a password reset link from reddit that was used to reset it.

Here's a screenshot of my mailbox:

https://postimg.cc/yDDybknf

After that I realised that I could make a new account with the same email meaning (I assume) that my email was no longer connected to any reddit account.

Is it possible I have a keylogger (Multiple other accounts of mine have been changed, I know my info was leaked but I change all the passwords already), and if so how do I determine if I do have one and how do I remove them(What I've attempted so far is looking at processes in task manager and process explorer which didn't help at all maybe because I don't really know what to look for, and I've used Malwarebytes to scan the PC but nothing came up). And if I can't find and remove them, should I do a factory reset on my PC just in case?

On another note, how is it possible that the other person even used my email, I have 2 factor authentification turned on and even I can't log in to my email without using my phone number?

Thanks in advance.