Oh honey that's depression with a capital D. Multiples can do that to ya, I have a set of twins that are 4 1/2yr old. It's a lot of work. A lot of people think stay at home mom's have it so easy, NOT! Spending every moment with people under 3ft tall is hard work. We need adult conversation!
Yes your children, husband and YOU deserve for you to be happy. It isn't shocking also that you have little or no sex drive right now. Sex takes energy and so do triples!!
You did the right thing, the first step is admitting theres a problem and now your going to see some one! ~yay~ Thats a step that many can't make....
Please be gentle with yourself and from one mom of multiples to another I'm here if you need a shoulder or just a rest.