I've been in the dark place you're currently in and the hardest part seems to be coming out of it. Just try to remember that Clomid is a wicked drug that's contributing GREATLY to your feeling this down.... but it WILL pass. Once in awhile it's okay to take a sick day (I like to call them mental health days) just to coddle yourself for a bit, but don't let it get to the point where you start losing focus of everything else in your life. Consider work a good distraction to get your mind off things, otherwise you'll focus TOO much on your hardships and you'll wallow deeper into the pain.
I know it's cliche, but take it one step at a time. Take care of yourself, you deserve to be pampered and spoiled right now. Take a bubble bath, watch a sad movie or read a book about someone's life that was far worse than yours (that seems to help me more than happy movies that make me want to puke :-P). Ask your dh to give you a head rub or back massage, but tell yourself inside that you WILL get through this. You WILL overcome this. Everything in life happens for a reason and you don't always know why things are playing out the way they are (and you may never know). Maybe you're not yet blessed with a child because there's something about having a child now that would cause you MORE pain than not having one. Or maybe your child is meant to be born later, because the person he or she will one day fall in love with is still not born yet. Destiny has its plans. You never know what the universe has in store or why things happen the way they do... but there IS a bigger picture. Just have faith that all will happen the way it's supposed to happen.