Solved it. Turns out it was the facebook app. Apparently I did not disconnect my account to the app properly, and when I was checking my store through chrome dev tools I saw a very long https call from facebook that caused the huge delay. Since it co...

Suddenly within the last hour, my store went from a < 2 second load time to >10 seconds. And I have no idea why. The only app I installed since then was the facebook app, and before that I only had Oberlo and shopify's own email marketing app install...