I can feel that you have been feeling a little depressed recently, and this feeling is really uncomfortable. First of all, I want to tell you that your feelings are completely understandable. Everyone will have such a time when they feel that they are not taken seriously or lack motivation. This does not mean that you are really unimportant, but that you may be going through a trough period. Regarding taking time off, I understand that you may need some time to adjust yourself. However, I suggest you carefully consider the way you ask for leave. Instead of making up reasons, it is better to communicate honestly with your superiors. You can say this： “Recently, I feel that my condition is not very good, and my work efficiency has declined. In order not to affect the team, I want to take two days off to adjust. I will use this time to take a good rest and put into work in a better condition when I come back. ” This expression is both honest and professional, and usually superiors will understand it. At the same time, I also encourage you to use this time to take good care of yourself. You can try some relaxing activities, or chat with trusted friends. If you continue to feel depressed, it is also a good choice to consider seeking professional psychological counseling. Remember, you are important, and your feelings deserve to be taken seriously. I hope you can get out of the trough as soon as possible and find the motivation and meaning of life again. If you need further communication, I am here anytime.