Thank you for posting in the Apple Support Communities. I would be concerned as well if my MacBook Pro was repeatedly freezing.
The suggestion you were given to make a new user account is a good step to help isolate if the issue is a system wide issue or specific to your user account. If it doesn't happen in the brand new user, then there is something specific to your user account that could be causing this. If it is still happening in the new user, you would want to look at system wide files and settings that could cause this. I found an article that will help you isolate and address a software issue:
You can find information on what to do when your Time Machine Backup drive becomes full under the section titled "Backup drive fills up" in the following article:
I hope this helps!