I've been very unproductive for the past few months. I don't know why I'm like this. I just know I'm not in the condition to do anything. I feel empty. I'm always tired. Sometimes I find myself thinking about things way too much and then sometimes I don't care about anything at all. I just like to stay in my bed all day because it avoids everything but also because I don't have the will and motivation to do anything. please help me.