What is wrong with my phone?

Tiarra, Thanks for posting the screen image of the boot error.

This is a well known failure of a flash memory module in the Note 4. There is another thread here on ifixit discussing this problem, and some temporary fixes like installing an app named WakeLock to prevent the CPU from sleeping when idle, and freezing the phone (without battery) then installing battery to get it to restart. I had both techinques to keep my Note4 working for a time, but the condition is terminal. The only fix is a mainboard replacement. Unfortunately, the only parts available are used boards from China which may well suffer the same problem.

Several class action lawsuits have been filed against Samsung on behalf of us Note4 owners.

For more details of the problem and history, do a search for: mmc failure Note 4