Photos taken on ipad mini not showing in iPhone stream suddenly

Hello, Stacyholiday.

Thank you for visiting Apple Support Communities.

Here are some troubleshooting steps that I could recommend trying when experiencing this issue.

I don't see photos in My Photo Stream on my iOS device.

• From the Home screen, tap Settings > Wi-Fi. Make sure that Wi-Fi is turned on and your device is connected to a wireless network. If necessary, troubleshoot your Internet connection on your iOS device.
• From your Home screen, tap Settings > iCloud > Photos (Photo Stream on a device using iOS 6) and make sure that My Photo Stream is turned on.
• Ensure that the Camera app is closed on the device that took the photo. Photos will not upload from an iOS device to My Photo Stream until the Camera app is closed.
• Ensure that your iOS device has not fallen below 20% battery power. To preserve battery life, Photo Stream downloading and uploading are disabled when the battery reaches this threshold. Downloading and uploading will resume once you charge your device and the battery charge is greater than 20%.

iCloud: My Photo Stream troubleshooting

http://support.apple.com/kb/ts3989

Cheers,

Jason H.