Is this normal?

I am about halfway through my husband's deployment. I am not pregnant, so that is not the reason. I have hit this huge nesting period. I don't want to eat, and can't sleep well, I just keep cleaning and cleaning. Every time I feel hungry, I get irritated with myself because I don't want to bother with eating. I can be exhausted, but I lay awake for hours. I am not responding to my kids properly, and feel enraged so much. I can't cry, but I want to. Everyone that tells me to get stronger doesn't know that I just want to scream at the top of my lungs at them. What is happening to me?