Mouse Movement

So I just bought myself a new macbook pro. Everything's been working great for the past 2-3 days until today. I woke up, got onto my mac and there was an update that I needed for the new MacOS. I downloaded it and everything seemed great until I tried my mouse. My mouse movement was completely messed up. Moving the mouse up and down was no problem but whenever I tried to move my mouse from left to right, it was move from left to right but have a downwards arch to it. It wouldn't go from the middle of the left side of my screen to the middle of the right side of my screen, instead, it would go from the middle of the left side of my screen to the bottom right corner. Please HELP ME!!!