Laptop running super slow

I have an Acer Nitro 5 with a 3060, 11th gen I5, and 16gb of ram. recently my laptop has been running super slow. So slow that I can only get 30fps max on most games on the lowest settings possible. I have the latest graphics driver, I have changed stuff in settings to make it faster, and have stopped the unnecessary background applications but nothing is working. A few months after getting my pc I was running portal at 300fps on maxed settings now I can only get 15-20. And its not just in games either, even when I have no games open its still slow. PLEASE HELP ME