How do you change your pword on here?

okay i don't want any one to get the wrong idea. about the questions that are being asked my little sister and her friend have been posting all types of crazy things on here. Im not sure if i have to make another yahoo page or what but i just asked a question about my delivery with twins and people thought i was joking. Well im not im really pregnant with twins and im 24 years of age i just did not want anybody to look at the questions i post and consider them as a waste of time. I tryed to just change my pword on here but i cant find it i might just have to make a whole nother page. Again sorry for all the retarded and ignorant questions thank u !