hi i had gone through your query and understand your concerns. i would come up with two most possibilities( for nausea,vomiting and headache )to fit your condition .these include 1.first possibility is MIGRAINE; possible causes include; -may be hereditary -may be result of liver diseases -may be unable handle stress well 2.second possibility is,gas trouble (or APD ACID PEPSIC DYSPEPSIA ).irregular dietary habits,modern lifestyles (drinking,smoking,etc),EXCESSIVE USE OF PAIN KILLERS,ANTIBIOTICS,STEROIDS for even minor complaints, CURRY,HURRY,,NIGHT WATCHING,SUPPRESSED STRONG EMOTIONS are the main causative factors. for swelling of legs and ankle; the possible cause may be VENOUS INSUFFICIENCY of the legs -elevation of the legs -restricted salt -avoid long standing etc are advisable I hope this is helpful for you, thank you