Hello, doctors. I am a 16 year old ambitious student who regularly takes part in numerous activities. I go to the gym and my diet is proper but it so happens that at the later weeks of each month, I lose motivation and feel depressed. The same things that would get me excited like talking to my friends and feeling the wind against the feed starts seeming pointless. But after a week or so, I go back to being excited again. This relentless cycle each month without gap takes a lot of precious time when I could be working on my virtual internships or reading ahead of my school work. Please, help?