Girlfriend, you need to slow yourself down. I understand EXACTLY where you are. I've been there, I've felt exactly the same way. Know that it is okay to feel exactly as you are feeling, and know that you do not need to solve this overnight. I'm sure you are feeling something similar to experiencing a creative block; you know you need an answer and nothing is coming in, you begin to panic because nothing is coming in, and the more you panic, the worse it gets.
Knowing that the phase your children in right now is only temporary still does not 'fix' or soothe the frustration you are feeling. Topping that off, you don't even really know what you want to DO with yourself.
Girl, you are in a radical state of change. You are on the verge of starting another 'phase' of your life, and when I say that, I mean you are changing and evolving on the inside. Others looking at you may not see it, but YOU definitely FEEL it. It's like trying to think of someone's name, it's on the tip of your tongue, but sill is elusive, and no matter how hard you think, you just can't remember, but you KNOW -- you know?
All I can tell you is, breathe. Stop pushing so hard. Relax your mind, stop trying so hard to find the answer. It will 'come' to you when you are ready and relaxed. Think through this process. Really try and pinpoint what you think is 'missing.' I can tell you how I did it, but it may not work for you, and I'm not sure if this is the appropriate spot to discuss it.