I had a depression problem after my 1st trip home between 1st and 2nd semester. The school counselor really helped me a lot during the time until the medication started working for me. Now that I think about it I was most likely borderline for years and the stress of medical school tipped me over the edge. I was also diagnosed with ADD when I was in my 1st semester. So I had a lot to deal with those few months.
You can beat this just get some help, don't be afraid to ask for help there are many others out there with the same problems. It doesn't matter what your friends are doing it only matters what you are doing today and what you need to do tomorrow.
Good luck

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Sometimes the questions are complicated
but the answer is simple. - Dr.Seuss