I need support but I don't even understand the problem to describe it

I'm not a dev, I'm a body modification artist. I've had a wordpress based website through 123reg for about 12 years. On Jan 21st I tried to view my website, the theme and layout was there but no pages. A few of the pages were displaying page versions from 4 years ago which must be in a backup somewhere i guess?
I cant even google this because I dont know what I'm googling. I've never seen this in 12 years of web editing.
17th Nov i started using cloudflare for the security certificate so I can take payments via my site. It has been totally fine until now. I dont know if its a wordpress update that's messed it up? There's no rollback options for wordpress versions, that i know of. 123reg customer support say they cant do anything because it would need to be resolved through cloudflare.
I have logs if someone can look please. I'm completely stumped and I'm usually ok with this for a non-dev. Thanks
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