Site loading blank screen!!! (or occasion 500 error)

I was in the process of creating a new page on my site today, when I realized I could not load the page any longer. Now none of my pages will load except the wp-admin. The url is https://www.franklincountypatriots.org.

I did install a couple of plugins, but they were much earlier in the day. I deactivated and deleted them though just to be sure.

Also tried renaming the .htaccess file which was suggested, but no luck. Then tried upgrading to 2.81, but still nothing.

Please help!!