[flowerbreeze]

First, see a therapist. Second, especially if the therapist recommends it, and they probably will given what you're telling, see a good psychiatrist. If they are any good, they'll request blood tests, not only prescribe something. Very often feeling lethargic, miserable, and unhappy is related to something physical.

One of the common issues is vitamin D deficiency, because our lifestyles have become rather indoorsy. If you have not been going outside during sunlight hours, it is something to get tested for.