Hi there ~
Having MDD is a common complaint among the general public. After anxiety
disorders, mood disorders
are the most common psychiatric complaints. It is not unusual to feel fine for a week and then hit the bottom for another week. If you have symptomatic problems for example, with sleeping you could use the help of some sedatives under a psychiatrist's supervision. I believe that you are going to get better, and you should only give it time. Patience is a virtue. I hope you are seeking the help of a counselor who is your mentor and guide in daily life situations.
I hope this helps. Take care.