Question / Help my mic works but i can't hear anything when my mic is connected.

[Purge_Camo]

i have a bluetooth uproar wireless headset but when i have obs open no sound goes through it but it can hear my mic. i dont know why it does that, its like you either use your mic and no game sound or you can use game sound but no mic. can someone please help me with this. i have been trying to fix this for the past 3 weeks