It was a bit slow when @laborcamp posted, but it seems to have cleared up now.
If you didn't restart the server or anything like that, then I suspect it was some kind of resource contention at your host. The network is often the most likely culprit.
I don't know how you're hosting this site, but for smaller instances, in my own experience, I've found Digital Ocean to be more reliable, better performing, and less expensive than AWS. Not that anybody ever wants to move hosts unless it's absolutely necessary.
Looking back at this thread, it seems like there's some kind of slowness once or twice a year. Seems pretty minor to me.