Sent about 30 photos but now unable to send anymore photos

Has anyone had this issue? I made a photo as an invitation to send to friends. Sent about 30 photos but now just says "Message failed to send". I can still send text messages and receive photos from others. Just won't let me send. Facebook Messenger support is horrendous. Tried to look for some live chat or anything to contact them about this but nothing. Is there a limit of photos you can send at once? Or does it think I spammed my own friends and won't send now?