Hello, I have a macbook pro Sierra 13 inch and after I updated my laptop to the Big Sur update, it started glitching and freezing a lot. I can't even do my school works or even search something on google because it's freezing too much, and I'm not even using that many browsers. When it starts to freeze there's a round loading rainbow thing comes up and it freezes for a moment and it loads, but sometimes during the loading it closes the web browser automatically. I really need to get my school works done bcs my finals and everything is coming, but what should I do to fix this problem?? Please help