IPhone 8 not receiving text alerts?

When I'm on and using my phone, it doesn't give me alerts when I receive a text. I need help immediately because I can't respond to texts when I want to

Did you go to notification settings and enable or turn on messenger, text notifications?

It's common on phones that you can't receive texts or for that matter use data services at the same time as receiving a CONVENTION call.

You might be signed out of your iCloud.

Check your Notification settings to see if everything is enabled. Could also toggle them on and off in any case.