Mic and Sound won't work at the same time

Registration date
Friday March 10, 2017
Last seen
March 10, 2017
I have a mic and if I plug it in to the headphone jack of my laptop, I can hear but I want it to have my mic too, so if I put it in the mic jack I can talk but the sound goes back to the laptop.(windows 7) I've spent over 2 1/2 hours trying to fix it and I've tried every single thing I've seen, I've restarted 6 times and plugged in other devices and it also didn't work so it is the computer. All I want is for me to be able to talk through the mic and hear the computer at the same time through my headset. On windows 10 I can just click a single button and it works but no option for windows 7