Hi there!
Yes, I think you're being irrational. I'm sorry you have been so upset that you couldn't eat, but if you go back on Atkins where you left off, you will not automatically balloon up to huge size.
Likely you will gain something just because your body has been under the stress of not eating, but just ignore that. In fact, don't weigh for a few days so that you can get yourself back into the groove without the added stress of looking at the scale.
Eat healthy. Eat what you're supposed to. Follow the Atkins plan as written.
Jay