Hi @ countrygirl_45,
Start phone in [https://www.verizonwireless.com/support/knowledge-base-160981/|safe mode] and check its’ performance. If it is OK then a downloaded app is the cause of the problem. The trick is to find out which one.
If still no good in safe mode, back up your phone, factory restore the phone and check if it works OK.
Check in ''Settings'' how to backup, factory restore and restore the phone
''Be aware that a factory restore will erase all your data and downloaded apps, that is why it's important to do a backup first!''
If it still doesn't work properly in factory default mode, as it is still under warranty, return it for a replacement or refund.
if it works OK, restore phone using the backup you made, and check the phone again.
If it now works Ok then the reset has resolved the problem