I am confused about my career

I am a medical student currently. I have failed an year. I try but i feel like it is just not for me. I wont say that everyone with me has their own struggles but they at least seem to enjoy their college time. I cannot. Its been almost 3 years but i am still struggling to just adjust in the surroundings. I was in depression for about a whole last year. I am a mess in my studies. I can never focus. I feel like i am lost. I cant find an answer for myself.