tired and stressed...

As I was getting out of bed today I uttered the sentence "I am such a waste of space"..and thats how I felt. I didn't all asleep till late last night and woke up really late in the morning. It takes such energy to get up and shower and get dressed. Putting on lotion or jewlery is a task, making lunch is a task, walking the dogs is a task...all tasks that exhaust me. I feel like I am wasting my life away being tired. I live in a 4 story walk up so walking my dogs is exhausting...by the time I get up 4 flights I am always so out of breath...I am so frustrated. I try to go for long walks but halfway through those walks I just want to be home sitting down because I am tired. I don't know what to do. I am so frustrated. I feel like crying right now. I want to have a "spark of life" in me. I want to want to get out and do things..I am jobless I can't find work..I feel so low because my parents are supporting me right now. I am away in graduate school and because of my class schedule and my living alone and needing to take care of my dogs I can't find a job that will work with my schedule. I am freaked out due to the economy situation. I am falling behind in school work because I can't focus on the readings..My mind waunders. I dont know what to do..I want to change..Im just not sure how.....I feel like I am wasting the best years of my life...I am young in my mid 20's and I am wasting them...