Seems you have a lot of responces here so this all may have been said but it felt like you had taken the thoughts from my head and put them on paper so i felt the need to say something. I've been tehre, i'm tehre every day, but 4 years ago due to some health problems during pregnancy I was diagnosed with chronic depression due to a chemical deficiency. I am not on medication, tried it and it jsut wasn't the way i wanted to live my life, therapy helps to a degree, though i don't go, i can analyze myself better tahn anyone that is after all what i do on those days that my will doesn't hold or i'm actually alone, i overthink every step, every word and wonder why it is no one else feels the way i do. and as for friends i have some i really do but like everything else in life i have to force myself to spend time with them or go out or even pick up the phone so my friendships are very distant and seriously neglected, add 4 kids and work and my fiance and who has time anyways right?
so the question is and always will be how do you deal? proper diet and excercise, lots of vitamins, i don't have a link but there is info online, a support system for those really bad days, be it yoga or writing or even posting here and understanding from those you love can really help. my fiance worries himself sick over me but it's just me, i think i'm normal, i've always felt this way, i don't know anything else, so the more he pushes the worse i feel, i hate to have to worry about him worring about me, and he sees through my hapy act, most ppl close to me do, just like your husband sees through yours and knows something is going on. Talk to him before he starts jumping to conclusions let him help you through this even if you just tell him your depressed and you don't know why but it isn't anything he can fix or that he caused you just wanted him to know. i had that conversation just the other night myself, it's been a really bad month for me.
other little things and it is always the little things and this is where your husband can help out a little bit, make time for yourself, and make time for your marriage, regardless of how you feel at the time, havign a good week great you still need time for you, even if it's just an hour a week, soak in the tub curl up with a good book, anything that you enjoy that can take your mind off of life for just a little bit.
spend lots of time outdoors, sunshine is a great cure for depression, if money is available purchase a sunlamp for in the winter or on those yucky cloudy days
chocolate, every womens favorite thing anyways is great and really will boost your mood, the darker the choclate the better, just don't over indulge.
and as much as it may not seem like it will help if you have any bad little habits, smoking ect. stop. like alchol, smoking is a depressant and a stressor for your body.
other than that it may sound funny but just keep faking it, you might just find that even though you really would have rather stayed in bed that you actually had a lot of fun because you didn't.
if you need anything at all or jsut want to talk you can send me a message, i check here several times a day, it isn't easy but you can get through this and you are not alone.