about a week ago i was really careless and signed onto my yahoo email account on a public computer. the computer wasnt very secure, it did not have any anti virus or any other protection on it. now i am trying to sign on my yahoo account and it tells me "invalid password". the forgot my password option does not work.... this email account is very important to me, it has alot of my important information. please tell me there is something i can do to save it. also is there anyway on yahoo or gmail of telling if somebody has been signing on my account?