Why is my iphone not telling me when i have a message?

I updated my iphone to the new ios 7 last week and all was working well until today, for some reason it hasn't been making a notification sound when i have a message and now isn't telling me when i have a message at all not even showing me on my messages so i have no idea if i have any new messages or not!
If anyone else has had this problem please answer as to how i can fix it!
Its not on silent and isn't on do not disturb i've turned it on and off number of times and still nothing has worked so far!

It hates you lol

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