iMessage wont open.

So me and this girl were talking and she told me that there is no such thing as sending to many emojis. So being the person i am i sent a extremely large message with probably 1000+ Emojis in a single message. After doing this my imessage closed and when i try to open it again it opens with a blank screen and closes probably 30 seconds into the blank screen. I tried turning off imessage, turning off my phone, and reseting my network settings and that seemed to do nothing. I looked for help on youtube and google and cant find anything that even relates to my problem. Im thinking that my phone is just processing the message but its been probably 45 minutes now and nothing has changed.