Security issues while texting iPhone

After I had sent a couple text messages a new text showed up in the "Text message" box as if I had typed it.  This has happened twice.

The first message reads as follows:

(And I wanted to be dangerous to cover your Luglena becomingq)

Second text

(Family if you didn't return your own Internet be home in income and you have a computer you can literally earn income from your kitchen table)

Seems like a pretty serious security issue.  Apple has never heard of this problem and they want me to go to an Apple store to talk to them.

It doesn't seem like a minimum wage person would be able to help figure this one out.

Anyone have any ideas?