It used to be so fast, now whatever I want to do takes ages to lead
this is usually a sign of too many resources being loaded on your site (unoptimized scripts, style sheets, large images, etc).
I am unable to add a page. I have been sitting in front of the screen waiting for my new, simple and empty page to be added for now 30 minutes. I tried refreshing, logging in again, tried everything. And it's not loading
you mean you're not seeing your page in the menu? or you can access the page but the content doesn't load? you need to be more specific and perhaps provide the URL address of your site