Hi. I'm putting on the moderator hat here and urging you to seek medical attention. It's beyond the scope of this forum to try to diagnose something as serious as this. If you think you can't afford medical care or otherwise can't access it, would you consider disclosing your general area? This is an international forum. Someone who lives closer to you can probably point you in the right direction.

Personally, I get crazy thirst sometimes when I eat high-fiber foods and simply forget to balance it out with water (I'm terrible for ignoring thirst), but never to the point of nausea. Excessive thirst is often a sign of diabetes. Again - get thee to thy medic.

Stick around and keep us posted. Best of luck to you.