It's like when someone dies and you don't feel sad but you feel like weird... I can't explain it

I kinda understand it, like a feeling that you need to do something but you don't know what

i felt like i needed to throw up yesterday. turns out i had diarrhea but btw ru like okay ru a ghost

Are you Okay?

That feeling when ___________________?

That feeling is the only feeling we can't accept or explain about it. It's a unexplainable feeling