im terribly sorry that im late to reply all comments ; ;
first, its okay! its my fault for not giving the watermark in a right place with high legibility tho ^^
and its internet... the artworks will fly around freely without copyright.
and might end up in someone blog of display picture. whenever i see my artwork is being used for
a display picture in facebook, i grin, yes i grin! XD inside my heart im happy that the person likes it♥
its totally ok to use all my artworks, but only dont steal the copyright for example "hey i create this stuff!"
anything besides that, like using it as facebook banner, pic on the blog etc, is totally ok♥