People can hear the sound on my pc in discord, so if im watching a youtube video they can hear it. But they cant even hear what i'm saying. My headset is a Turtle Beach PX24 and i use this splitter https/tubby.scene7.com/is/image/tubby/TB35MMDUALMAL?.
I don't know what im supposed to do to fix it
Ok, so after messing around with my headset i think that there's something wrong with my mic. It's like it picks up sound from the earbuds instead of the mic. When i tap nor talk in there it's like it picks up more sound than talking into my actual mic.
Not exactly sure what you're using that splitter for - may not even have anything to do with your problem. First thing to do is to check what your Recording device is set to in Windows. Right Click the sound icon near the bottom right and pick recording devices, if it's set to something other than the Mic on your headset - there's your problem.
If that checks out, also check your recording device in Discord itself. By default, most chat apps use whatever device is defaulted in the Recording Devices section i had you check. Make sure it's either your headset mic or set to windows default.
But they are hearing it clearly or with distortion?
If they hear it clearly the stereo mix might be enabled or Discord recording device might be set to desktop audio, if they hear it with distortion then your mic is picking it up and you need to turn way down either the mic boost/volume or the speakers (guessing you're using them)
Note: I don't believe that mic is able to pick whatever it comes from headphones speakers unless you have crazy loud volume on it