Why did my text messages disappear after I turned my iphone back on after it it had been powered down for the night?

Okay, so I'm new to iphone this is my first one and it's the iphone6. Last night I powered it down for the night, and when I woke up a d turned it back on and unlocked the lock screen and went to my home screen it said I had two text messages and before I could click on it they disappeared. So where did they go and is there any way to find them?

The banners across the screen are just "alert" messages to let you know something needs attention. They vanish once you do anything.

Touch the green & white "Messages" icon and you should see any text messages.

If you have any other message apps like skype or whatsapp, the message could be in those - or in your email
Whichever it is should have a small red circle with a number in it, showing in the corner of the app that needs attention.

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