Extreme stim tolerance

Dear nootropic reddit,
i#ve put off to write this for many weeks

I got into Medschool out of luck despite lacking grades
I tried to raw dog it and had a big friendship circle where we learned together in the library all day
i noticed I failed most of my classes despite staying longer than all of my peers.

I knew something had to change so I tried many nootropics (semax etc.) they didn't really make a difference until I came to stimulants and aced my first 2 exams.

I used them for about 3 months (with breaks) and did a 3.5 month break
In the 3 month break I am still in right now I noticed I became extremely antisocial neurotic low self esteem stay in bed all day dont do things I before enjoyed and also my dick doesn't work anymor and studying is basically impossible (next exam in 1 month)

I went to the doctor and told him everything he just said to reduce stress and gave me dick pills.
After my blood was fine despite kinda low testosterone

I am aware that I am fully responsible for this issue but it was a high pressure situation for me that I wasnt used to.

Im really frustrated as what I see online after 3 months you should be normal again.

Can any of you guys tell me what to do I feel like life is literally impossible for me right now.
And I honestly have no clue what to do