I don't think it's too likely that roleplayerguild was hit, but if you're on planetminecraft.com and curse's minecraft forums, this may be relevant. This is especially relevant if you're on Discord. A security exploit's been running from September 22nd of last year up to not long ago that, along with other things, might have screwed your password.

https://github.com/pirate/sites-using-cloudflare

Edit: Roleplayerguild users should also change their passwords. Official report as provided by a below poster:
https://blog.cloudflare.com/incident-report-on-memory-leak-caused-by-cloudflare-parser-bug/

Here's a few comments with steps to take.
[quote=@Shienvien]
	First, [b]clear all cookies and cached info associated to the affected sites[/b] from your browser. [i]Then[/i] log back in and change your password. This should take care of your account being a "weak link". 

	A possible evil-doer would, in this instance, gain access to the still-vulnerable account - so all you could do, they could. 

	Backuping is always a good idea - might not be an attack, might be server problem, might be anything - easiest for shorter RPs might be to just make an arbitrary dedicated folder on your computer, and then right click on each page of your RP - "save webpage as". HTML works.
[/quote]

For changing password:

[quote=@Emuxe]
[@GoddessSophia] Go to your profile and press the "edit" button next to your username. You should be able to change your password from the page where it takes you.
[/quote]
or

[quote=@Shienvien]
	[@GoddessSophia] Just use the "Forgot password?" link at the bottom of the login window. 
[/quote]