Hi Bellablor... I have just signed up and this is my first engagement with the network! Coincidently, your post is the first that I read!
I felt and could sympathize exactly where you are at! I too am in the waiting stage, post initial diagnosis, lumpectomy, sentinel node biopsy. I too am living the same waiting game, I get my 'plan' on the 3rd of April, the results and treatment! What a whirlwind! The sick feeling in my stomach is at times overwhelming - worse case scenario thinking often appears in my thoughts, particularly at 3am in the morning. My breast care nurse said the three best things I can do for myself is exercise (obviously when I am sufficiently recovered from surgery), sleep (not doing well on this one) and stress. I am not sure how to reduce stress when everything is so overwhelming.
I have no advice as I am in about the same boat as you ... but you are not alone