Hello Val! Thank you for your question. I will be assisting you today.I'm sorry about the issue. Unfortunately, once you have sent a text message, it is instantly sent to the other person's phone/device, so there is no way to recall it. It is similar to the way that once your postal mail is picked up by the post office, you cannot stop its delivery. The only thing you can do is to send another text message and ask the person not to read your previous text message. When sending any text message, make sure to check carefully both the name and/or phone number of any recipient.
Please let me know if you have any further question. Thank you,