I checked my toliet and i aw something with many legs and redish brown and like a V in the back.I know they have bigger once in Thailand and they bit but is there like 2 cm kind you can have in your stomach?I am not sure it swim up from the drain or tank and came to my toliet or my stomach kicked it out? It does not look like a hookworm more like  http://en.wikipedia.org/wiki/Centipede but very small