Help Samsung Galaxy S5 Calendar Issues

I attempted to sync my fb and Google w my calendar. My fb isn't working at all, it's not on my list of synced calendars, but when I try to add it, it says already added. But nothing is on my calendar. When I go to add Google Calendar it says error, try later. If my fb calendar is already synced, it's not on my list, but won't let me add it. What happened? Wish I could add a pic, cause this sounds confusing reading it back.