oh my god what was that?

i don't know what the hell happened but i just took a bath, a really hot bath with some Sea Salt s in it. my heart started throbbing and when i got out, my heart kept throbbing more and more and i got terribly nauseous, and then spins and spins, felt so dizzy i almost fell, and i got a throbbing piercing headache as well and i am here gasping for air and i've totally passed out. what the hell is that. i also got so thirsty i already had three large glasses of water and still need more but i am so wiped out i can't get up and get it. never felt so bad after a bath. any ideas?!?