help!!! really bad pains.

when I get my periods they are bad- I mean really bad. before I get my period for 2 days straight I have stomach and intestine pains, throwing up and constipation. it hurts so bad I cry. then during my whole period I am always taking panadol and neurofen. my cramps get so bad my body goes into shock and I start getting cold sweat, nausea, dizziness, can't see or hear properly ( like a panic attack ) due to my body not being able to handle pain, what period pain pills do you recommend?