Wow, a triple quote! I'm flattered!
Well, Julianna, I can only suggest a few things here...
1: Make sure your notification volume is up.
Settings - Sounds and Vibration - Volume and set the Notifications volume slider to your preferred loudness.
2. Make sure your text app notifications are set.
Settings - Notifications and select your text app. For example, I use Pulse as my text app. If you use the stock Messages app, select it and make sure it's ON. Under the "Recently sent" apps, tap "See all" at the bottom to, well, see all your apps. Turn your text app on.
3. Enable Notifications in the app permissions.
Settings - Apps select "All" and scroll to your text app. If you don't see it, use the overflow menu (three dots, upper left) to Show system apps. Then select it. Under the app settings, ensure Notifications are ALLOWED - plus you can select
which notifications you want to receive.
That's all I can think of, Julianna. Let's hope it works!