Hi Doctor , Quick Question,im 21 Year Old Male Of

hi doctor , quick question,im 21 year old male of mixed heritage (gREEK AND ETHIOPIAN) i believe i have undiagnosed ADD and math difficulties and its affecting my life really negatively to the point of suicide ideation and mental instability , ive talked to my doctor ,they just passed it off as major depression , they put me on mitrazepine but its not helping as i dont believe im depressed, just have anxiety and self esteem issues . what should i do and what are the symptoms of adult add? im really giving up