Calendar information missing, no I cloud backup, settings claims email calendar is still on, option not available in calendar app

So this morning when I went to check my calendar for my schedule it was completely blank. I went to "calendars" at the bottom of the application & it obly had the "birthday" calendar to select, the other three were gone. I checked another way by going into settings and then email, and it claimed that the calendars were selected & up and running, but they are not available to check in the calendar app. I also do not use iCloud because I do not have the space for everything or even my calendar because my family has 8 different apple products so the free iCloud data was sucked up extremely fast. What can I do to fix this?! I'm kind of freaking out because the calendars app is pretty much my only way of knowing what time I need to be where & it's all gone!

Last night before I went to bed it was all there. I went on Facebook, candy crush, & the internet for an hour and a half & then preceded to go to sleep. I woke up this morning with my calendar missing.

Someone please help?