Messaging concerns are not what we want for you. Our goal is to help. What make and model device do you have? What messaging application (default, Message+, etc.) are you using? What changes (updates, downloads, etc.) have you made to the device prior to this issue?
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!!