Hi ascarber,
Welcome to the forum... These do sound to me like symptoms of depression. No, you are not lazy. You said yourself that you had wanted to get a lot of things done. Have you been in for a check-up recently? Low motivation and feeling especially tired can be for physical or for psychological reasons. How do you feel after a short/brisk walk? Do you feel better or worse or no different? I would try the doc first and get a full blood panel and tell them how you have been feeling. You might also want to contact a psychotherapist at that time. Good luck, ascarber, try not to feel guilty or hard on yourself. Ask yourself how you really have been feeling. Does it include exhausted or overwhelmed? Let us know how you are doing...