IPhone messages not working correctly?

Well I've been having trouble with the messenger app for a month now… Sometimes the messages won't show up when people send them and I'll get no notification of it. Also, where there should be a red circle with the number of messages I have, it's not there anymore. So I'm constantly guessing if I have texts. I don't know if there's anything to fix it… I've turned it on and off a few times over the course of the month and my software is up to date. I have an iPhone4s… Thanks!

Uninstall the messenger app and reinstall it

hope it will work

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