Suggest Treatment For Extreme Mood Swings

Okay, I just wanna know if there is anything wrong with me so, some days I m very hopefully for my future and I m very content with my personality and my physical appearance, I can manage to read a book, play video games and just go about my day with a good attitude but out of no where IL look myself in the mirror and I just think I look ugly, and I think about how bad I m doing in school and how lonely I am and how much time I spend in my room and at home and I won t feel like doing a single thing but stay in bed and cry, cry for help for guidance, that s when I get urges to put anything in my body ANYTHING, just to make me feel better, I decided to quit drugs about a week ago, I was a close to everyday Marijuana smoker and I would occasionally use psychedelics. Cus as soon as I inhale that smoke, all my worries all my insecurities and all the consequences go away but, I don t wanna be that person anymore, I find it soo hard to get thru my regular life sober, I almost cannot stand it. Also sometimes il sleep 6 hours and wake up with a lot of hope and energy but sometimes I will sleep 8 hours and wake up feeling like a fat and exhausted piece of shit. I really don t know what to do, I am so lost, please give me some kind of answer. I also sometimes will have a lot of self esteem and confidence and will make plans to ask this girl I really like out. But other days I will feel so ugly and worthless and not worthy of her. Please help me. I m not suicidal or anything related to that.