Suggest Treatment For Fatigue With Headache And Dizzines

Hi, I have pcos and type 2 diabetes, I am sick all the time, I have days when I'm ok, sometimes a week or 2 but then will be sick for a few days maybe a week between 5 - 20 times a day, have a headache, feel dizzy and often my joints will feel sore, my doctor is not taking this seriously and all i've had for the sickness is peppermint tablets which do not make a blind bit of difference, I am taking metformin which I don't think is causing the sickness as was just as bad before. Is there anything else I can take/do, I carry on and go to work and stuff coz I have to but am getting tireder and tireder and cannot keep going like this forever.