u/Few-Formal-8600

Hello, I’ve recently stumbled upon this issue where I get random ping spikes on my pc, and yes I have an ethernet cable. I’ve tried another cable yet it still stays the same, this issue has been going on for almost TWO weeks! I’ve tried turning off the modem for a few minutes and turning it back on but it stays the same. This issue happens on websites and even on phones. Does anyone know what is the cause of this and how to fix it?