Hello there, dressagirlct.
There are a few steps to try for resolving your issue. The steps in this article help rule that out:
If an app doesn't respond to your input, or doesn't perform as expected, do the following, testing after each step:
Learn more about troubleshooting apps.
If the issue persists, try toggling your settings for iCloud and troubleshooting in regards to Notes as recommended in the following:
Thirdly, if you still find yourself unable to use the Notes app as expected, then you will need to restore your device from a backup:
Thanks for reaching out to Apple Support Communities.