I'm a 20 years old boy, a medical student, suffering from severe hair loss every day. Any suggestions? (photos)

There is no cure for male pattern balding. If you know this, you can be a smarter consumer.
Medications such a Propecia or Rogaine can help and for some people it may delay the balding for many years. Surgery also helps but it is just rearranging what you already have. Scalp MicroPigmentation also helps but that is not real hair. The point is that every option has its limitations. Oils, potions, shampoos, lasers, PRP, etc will not cure genetic balding.

As a medical student and future doctor, you should be a scientist and a metrics person. Your biggest enemy is the
progressive thinning leading to a balding pattern that is not evident at this
point in time. The degree of thinning that you are showing would suggest that
you should see a doctor who most likely will get Bulk Measurements of your hair
to determine the degree of the thinning that you are presently having. If the
diagnosis is early genetic hair loss, then the best treatment would be the drug
finasteride which is highly effective in men of your age and may not only stop
the hair loss but possibly reverse it. If you are developing a more advanced
balding pattern the the best test to get will determine the Bulk Measurements
of your hair and this will show, over a one year time frame, how effective the
treatment will be. Once you know this information, then you and your doctor
need to develop a MASTER PLAN which will define what you need to do over the
years to come.