Hello madisonaliff3,
Thanks for reaching out using Apple Support Communities!
We see you're trying to forward your messages to another device; we'll do our best to assist from here.
This Apple Support page has the full details to help adjust your settings to forward your messages: How to forward SMS/MMS text messages from your iPhone to your iPad, iPod touch or Mac - Apple Support You might need to get your carrier involved if this is only for SMS messages.
This should help you get back on track to getting all your messages again by forwarding them to another device.
Cheers!