No stress—here are a few quick things to try:
• Make sure your phone’s software is up to date and you’re on a strong Wi-Fi connection.
• Restart your phone and try uploading again.
• Check that your photos are saved to your device (not just in the cloud). If needed, download them to your camera roll first.
• Hang tight—it might take a few minutes for all your photos to finish uploading, especially if you're uploading a bunch of memories!