Ok so I decided to deactivate all my plugins, reset themes everything. Not sure why but suddenly, my pages were blank as asual, not showing any blog posts. However, when I tried to add a page called blogs, and make it my ‘posts page’ in the ‘Reading’ settings, all my pages returned to the way they were before: Every page showing a list of all my posts.
Starting to think this might be a caching problem or a problem in WordPress core..