Are you using a Mic splitter? If not try that, with the green in green slot and red/ pink in red/ pink either in the back of your PC motherboard/ the sound card or even the front of the PC by the USB ports if you have one on your case. You could also try searching in the windows search bar in the bottom left for "sound" then see if your mic is going up and down when you speak. If not go to properties and boost it up to 50 or 100% depending on what it is on.