You are the same age as I was when I first looked for help for my gambling problem. What I first learnt was that I was one of those people who could not gamble normally. Even when I won I would just keep gambling until I lost it all.
What advice can I give you? First – read some of the posts on here … the same advice is given to all new quitters – block or ban yourself from places you gamble, limit your access to money, find other things to do and get good support. Can you go back to the psychiatrist who was helpful or access counseling or a support group?
Things only started to change for me when I took my recovery as seriously as I took my gambling. I put all my energy into it and although it wasn’t a straight forward ride (I had a few “slips”) gradually things got better.
If you are feeling depressed and / or suicidal – please talk to someone. There will be specialist helplines in your country for this – please make use of them and get as much support as you can. I wish you well.