You're right. The Lexapro won't solve any of your problems if it's a physiological problem. Follow your instincts and see if there's a hormonal or other cause first. Docs, especially general docs, are very quick to give you a drug that suppresses symptoms rather than treating the problem. And if you ever do decide to go on an antidepressant, I'd advise doing it with a psychiatrist, not a general doc -- they know the downsides of these drugs better usually. As for the Ambien, be careful with that, too -- if you take it on a regular basis you will end up with worse insomnia. Once in awhile is okay, but it sounds odd -- from what you say you're sleeping fine -- too fine. So why a sleeping aid when you're problem as you state it is that you don't want to be awake? So here's the thing -- any one of the problems you mention, low testosterone, thyroid problems, or lack of Vitamin D can cause all your symptoms. None of them is treated with an antidepressant.