Alex, it may be time to disassemble your laptop and give it a thorough cleaning. Dust and small debri builds up on/around the fan , heat sinks and other components on the laptop boards reducing cooling efficiency badly. Video below will show disassembly of your device which will allow you to clean dust, etc. from components using a can of compressed air and small brush. If not up to the task, computer repair shops offer this service. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=g0rbiJN69RA