Can't enable iCloud backup

I recently had an issue backing up my iPhone 6s to iCloud due to storage issues. So I cleaned up a bunch of things and even deleted the backup. Now when I go to my storage settings I'm told that I have 4.4gb available and my next backup size will be 3.2gb. But on the app list it says Photo Library is 5.5gb.(Pic attached) I don't even do an iCloud photo library and my camera roll is only 2.5gb. When I try and turn off a backup, it won't let me. I've done network resets, turned off and on iCloud backups. But I still cannot backup to iCloud. (I have backed up to my computer as a safety net)

Please help.