Personal question i need help...

So i struggle with depression and anxiety. Its getting to the point where i cant take it anymore and cant function right throughout the day... im thinking of going to the doctor to get prescription of medical marijuana.. Dont judge me please... Im 23 years old. I was wondering how can i tell the doctor this and make him say yes and approve without him saying "oh no your lying " you cant have it.. anyone that has this same issue as me let me know and how do i say it to my doctor ?? i cant even smile anymore and i cry too much.... 😞everyone tells me to get that and 1 smoke a day will help me get through my day i guess.. i tried it before but ehhh ... it was a fail... thank you