SLSelf82, I text most of the day and rely on my notifications as well. We definitely want to get to the bottom of this to get your notification sound back to normal. What changed with the device since the issue began, like a new app or software update? What is your device's make and model? What application do you use for your text messaging?
Follow us on Twitter @VZWSupport
If my response answered your question please click the _Correct Answer_ button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!