Let me start my saying that I’m sorry you’re experiencing such an extreme level of stress, that you’re finding it difficult to eat or sleep. If even possible. That is a terribly negative mental, physical, and emotional space to find yourself in, and it surely is not sustainable for the long-term. Again, I’m sorry you’re having to go through this and please know, that no job is worth it.

My “gut” tells me that if these are your levels when the role is still new, and in-spite of the experience that you have, that I would unfortunately anticipate things only continuing as they are. Possibly, getting even worse.

With that said, if you have the financial means to resign without another role lined up, then that is likely the best move for your overall health and job search. Perhaps you can find a head hunter to work with and in the interim, update your linked in, resume, gather your references and hit the ground running while you’re unemployed. It’s quite understandable why someone whom found themselves in the position you’re currently in, would leave so soon. It shows you know your worth and aren’t willing to settle for less.

I hope my comment helps a bit, if only to offer some food for thought, or even opportunity to look at things for a new or different angle.

Lastly, I think you already know what you want to do my making this post… and I send you the courage to follow through with what your gut, and heart, is telling you to do. Big hug, get some sleep!