Iphone message app completely broke?

This has started happening a couple hours ago, it started off with my suddenly not getting any notifications when i got a text (not even a blue dot beside the unread text message) and i checked the notification center was unaltered. But then I'd be texting someone for a bit, then all the texts i just sent and theirs too would disappear and end up showing me texts but missing like the last couple hours of texts i'd just been sending.

Now i've been sending texts and they won't even go through at all even though my signal is fine, when trying to imessage someone the send button doesn't turn blue but stays green whilst connected to Wi-Fi or 3g

I don't know what's going on, any help would be appreciated

I have an iPhone and I've had glitches like this before. Turn off the phone, remove the SIM card for a short while, then put it back in and turn the phone on again. If that doesn't work, reset your phone through iTunes. (Backup your music, apps, and contacts first)

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