I hear myself on the laptop?

Co
2

Have a little problem I suddenly hear myself on the laptop had headphones on and suddenly I hear every sound I make and I was only in Youtube even if I switch off the headphones I can hear myself through the laptop speakers, it may be that someone is listening to me have Wi-Fi off and flight mode on but still why is that?

Te

Maybe your microphone just turned on. Deactivate it, then that should be gone.

Co

I have already deactivated it, then there's a constant click sound as if I were constantly clicking on the mouse?