I Have Been Diagnosed With ADHD And Severe Depression. My

I have been diagnosed with ADHD and severe depression. My doctor just put me on Seroquel 50 mg, and increasing the dose every 2 days until I get up to 300mg a day. I don't understand why I'm being put on this when it makes me groggy and sleepier than I already am. She said once I get up to the dose she wants (300 mg) I will have more energy and feel better. I know I'm only on day 3 but I am still sad, heavy feeling and crying a lot. The physcologist suggested she put me on Vyvanse or that drug therapy group but my doctor says some doctors will prescribe those medications but she will not. I feel Iike I want to switch doctors only because things are not getting better and after I've read the side effects of Seroquel I don't feel this is the medication for me because I do have high blood pressure and diabetes type II also.