About my mental well-being

hi,
I study medicine and I'm in 5th year.

my proplem started 5 years ago at time I graduated from high school.
My first girlfriend has dumped all the sudden with no reasons and she refused to talk to me or even to give a clue why she dumped me. That year I was so sad, even though i was sad, I've graduated from high school with high grade 97%.
Then there were these tests you have to take to be accepted in univesities, in that specific time I felt so bored and started to take tests without studying and pass through it.
The results came up and I was accepted in two medical schools and one oil company.
I've chosen medical school which was in my city, but the other one was in the capital city of my country. So, I started medical studying and i was so depressed because my college was very bad in way we were studying in other colleges because we don't have a building ourselevs.
then came the results of first year and it was so fustraiting
from 97% in high school to 79% in 1st year
and also in the next years, 2nd year was 63%, 3rd 62% with F in anatomy
4th year 63%, and now I'v an F in ENT and the results still progressing.



I want to ask you about this, I feel fustraited and angry all the time even for the little things ,and if I have a test after 10 days I can't study until the night before the test even if I wanted to, why this is happening to me? I don't deserve this ,
please help me with your advice?



Regards,