phosphenes

Hi, I recently realized that I have emotional phases in my life and I categorized them in 3 different ways. First one is amazing. I feel awesome, I know that my future will be great, I have amazing friends, etc. I love my major and I am hopeful. Second one is okay, everything is in the normal level. I don't have many hopes or I really don't want to do anything. I am not happy nor sad. And the third phase is the worst! I feel like I am in a space with no lights. My feelings from my past came and hunt me down. I feel hopeless, I have no joy, etc. I wanna have a break for 1 or 2 weeks. I always feel down and I cannot sleep. I don't know what should I do in this situation. In the first phase, everything is great. But eventually, I am getting in the third phase and actually nowadays I am in the third phase. I don't know how or what to feel. I just feel hopeless...