"I haven't felt like working or seeing anyone for the past 3 weeks, I think it might be depression. What do you think?"

It sounds like you may be experiencing symptoms of depression, as you mentioned feeling a lack of motivation to work or socialize. Seeking a medical appointment would be a good idea to discuss your symptoms and explore treatment options. In the meantime, there are support hotlines and resources available to help you cope with your feelings. Remember, you are not alone in this.