iCloud not syncing calendar properly (iPad, iPhone, Mac)

Recently my iCloud calendar hasn't been syncing properly to my iPad. I just realized this and turned off/on the calendar option in iCloud (for all of them) but this didn't do anything besides wipe all my appointments from my iPhone. I don't know how to get them to come back. The appointments still show up on iCloud.com as well as on Calendar on my Mac. Just not on my iPad and apparently now my iPhone too. When I add a new appt on my Mac or iCloud, they show up on the other one, but not on iPhone or iPad.

Please help!

Thanks.