I started typing a text message and needed to send a second one because I the email was too big. I didn't send the first one

[5guerras]

Help recovering a previous version of a text message

 

[webworkings]

As far as I know that isn't possible unless the phone automatically saves texts you start but don't send. Many actually do, but you would have to check the messages app to see if it is there. If it isn't, then there is no way to get it back.