Pages publish but don't show on site

I published a new page to my site today, and it shows up in the preview but when I go on my main site it won’t appear.

It’s bizarre because it’s showing up on my mobile phone web browser but not my desktop, on Chrome or Internet Explorer…

I’d really appreciate advice on how to fix this, but please put this in baby language as I’m a web amateur so not familiar with coding or anything like that…

My wordpress blog is https://www.hairbycardiffclaire.wordpress.com.

The page should appear as a sub-page in the “My Happy Brides” section…

Thank you in advance