Well, ,et me start by saying this: My goodness, woman! How in the world do you get all of that done?Those self-proclaimed "alpha-moms" couldn't hold a candle to you, so try and take a deep breath and give yourself some credit-a lot actually, reading your schedule is making me want to take a nap!
That being said, yes, exhaustion may very well be a factor, but you know yourself well enough to know when there's something that's inconsistant with your usual self,so the fact that you saw your Dr. about it does make me think that you are pretty sure your having a bout with depression.
Without making this about me, I had a royally screwed up life until I hit age 26 or so, and had my 1st baby. I am about to turn 30. I always had emotional/mental health issues, and NEVER wanted to take anything,except illegal drugs for a good 15-18 years. I finally really got into trouble one day and ended up being forced to be on meds, and I can say from experience, that I was so sorry I hadn't just been more open minded about it earlier on in life. I have been on all types of meds at some point, but I have been off of them for years and doing good.
I understand that Lexapro is tricky to get off of, some say it takes 6-12 months to wean. There are other SSRI antidepressants that are milder ,yet effective, and can be discontinued 'cold-turkey'. Maybe you would want to try one of those. Someone said Zoloft or prozac, paxil even and I agree with that.
I can understand not wanting to become dependent on a substance for life, but if it seems the better option to do so than to possibly feel needlessly depressed for life, too, then I suggest giving medication a chance, though I've not personally known anyone(including self), that has had to be on it for more than 3-24 months(antidepressants).
Also, one thing I really want to stress here, is that if you want medication to be as effective as possible and be able to not develop a long term dependence, then you've got to go into it not expecting too much from a pill. It will not change any life situation that's out of your control, or any less than desirable behavior on your part. It is a tool, to be used as a part of a plan. Most often, getting some counseling/therapy and re-learning how to deal with the stressors in your life, in conjunction with meds, would be the best route. The theory is that the meds help with the motivation and ability to begin working on self and change. But, if you really are just having a weird short term bout of the blues, then you may just need it for a little while alone.
Again, those are questions that only you truly know the answer to. Have a frank talk with your Dr. and let him know what your concerns are, just make sure not to do nothing about it if it continues