I feel very sad and have no energy to stay anymore , but believe doctors think i am a frau and wasting their time, hesitant to ask for more direct help?

Possible medication : You might need a modification in the medication (pristiq) you are prescribed for depression. You should consult with the person who has prescribed it for you and also ask for a complete blood workup to identify other possible physical problems. Finally, if no physical problems are identified, consult with a psychologist for additional therapy.