### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, Im 19 years old and I am a female. I have a problem that has just come on suddenly in thepast 2-3 weeks. I used to go out all the time, to my friends, but lately ihavnt felt like going out at all. Even if its just to go do the shopping. Iused to go out everyday and enjoyed my friends company, but now I want to juststay indoors and when i do go out occasionaly all I can think about is goingback home.I have had times lately were I would just start crying for no reasonas well.I have not gone to see a doctor because I dont know if its anything medical, but it is taking affect on my health and diet. I am eating alot more then usual and I cant sleep at night. I tend to stay up all night even when im tired. Im not on any medication and I have never had any serious medical conditions before. I just dont feel like myself anymore. What can be causing this suddenchange of mood? and will it pass?

### output:

His understand your concern. I appreciate that you have given very nice history. I had gone through it and guess it may like you have depression. According to DSM 5 depression has required following features for at least 2 weeks. Low mood or sad mood with loss of interest in daily activities. Change in apatite or change in weight. Sleep disturbance. Somatic complains like lack of concentration/easily getting fatigue etc. It is psychological process and need proper evaluation. Early treatment will bring fast and better recovery. It can be treated with different modalities of treatment like medicines and counseling. In medicines SSRI/Escitalopram/sertraline can be useful. But take psychiatrist advise before taking any medicines. Sudden change in mood and thinking may require assessment. So consult psychiatrist and get help. Thank you. Wish you a very good health.