Trouble with iPhone 4 texting?

So I might've kinda spammed a friend of mine (for fun of course) I sent a few turtle emoji (copy and paste them and repeat so there's a lot). But when I tried sending it, my screen froze. I closed out of the app. Now when I try to open the text app on my phone the screen will come up blank (like the screen when you're sending a text but without the text boxes so its pretty much just gray). And after a while the app will close itself and go back to the home screen. My friend's phone works (the same thing happened to hers) but when she tried to fix mine, it didn't work. Any ideas? I've done this before but this is the first time it's happened.

Try deleting the app from Multitasking. If that doesn't wok you could try to turn your phone off then back on.

Slow texting on keyboard Iph 4

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