First of all beware of the phishing sites. What is a phishing site ? " It is a scam site where they try to mimic myetherwallet. For example , myetnerwailet.com , myerterwallet.com , etc " so beware of the phishing sites . You must be very careful on viewing or sending your eth, once you log on this sites your doomed. You must also not click any spams in the slack , there are so many spammers in the slack that redirected to phishing sites if you click them. Just be careful next time.