I feel sick

When I get this frustrated, this utterly sad and at the same time angry, because I don't understand.
I feel sick.
I feel like vomiting.
I feel just like sitting in my room and see noone.

HOW is that good evolutionarily speaking? IT'S NOT.
It won't help anyone to vomit for g-ds sake.

I just want to vomit.
I just want it to stop.