Weight gain, always sleppy, tired, no energy. not pregnant. very emotional/angry at times. what is wrong?

Can't say: There are many possible reasons for these symptoms. Depression was mentioned earlier - Atypical depressive disorder can present with simliar symptoms. There are a number of medical conditions that could be causative. I would encourage you to consider exploring this further with your physician. It is best to get an accurate assessment rather then just get a guess from one of us on-line doctors.