Sound Issue With Headset (Win10)

[ItZzSora]

Currently when I have sound coming through the headset, it is also played on my microphone. I don't have the Realtek drivers (It says I have "MDI Synthesizer") and I don't know how I can fix this or why it's even happening. My headset is plugged in via 3.5mm jack for both headphones and microphone (not the same cable, green and pink) and there is no usb.

Thanks.

 

[ItZzSora]

Here's what the Device manager looks like for my sound stuffs. http/puu.sh/rjeLh/72e11b7be2.png

 

[ItZzSora]

Do I just need to buy a sound card and use that?