My first thought is to make sure they check your thyroid levels. Feeling tired and depressed is a classic example of hypo thyroidism....as compared to hyperthyroidism.

Everyone relates others' symptoms to their own experience, and hypothyroidism and Hoshomoto's (sp?) disease (which is an autoimmune disorder) is my experience, so be sure they check thyroid levels.

Good luck and I sure hope it's nothing serious!

PS - is there such a thing as post-marital depression....kind of like post-partum depression? I would think so after the whole big build-up to the actual wedding and such, so maybe that's what it is.......