As promised here's my update from coming back to Canada today!
I had absolutely no issues with coming back to Canada the whole way. I uploaded all my vaccine paperwork and filled out the ArriveCAN app yesterday, so I just made sure to have windows on my phone ready with the receipt from that, my covid test results, and my boarding passes so I could just easily flip through them. They checked my negative covid tests both at the checked in desk before the flight and at customs when I got into Calgary.
As a note my boyfriend was travelling with his covid confirmation and recovery documents from last month when he had a breakthrough case and he also had no issues at all using them coming back.
LAX was kind of intimidating as it seemed super busy and disorganized, but from what I've read that's not out of the ordinary for it. Unfortunately our Westjet flight was delayed for an hour because there was an empty Delta plane that no one was moving out of the way for our plane to dock. I felt bad for us but even worse for the people on board the westjet plane that had to wait on the tarmac for an extra hour for someone to come and move it.
It caused us to miss our connection to Regina, but they put us on the red eye without any issue so we'll still get back tonight, just much later than planned so no big deal.
Overall it went much better than I was prepared for! Again, let me know if anyone has any questions!