I was inclined to shut down to cope , narrow my focus and put emotion to one side until treatment ended .I did collapse thereafter however but am ok now - that’s another story.
Being a pragmatist first - have you got travel insurance as you probably will need to defer that trip ?Also what support structures have you got that you can off load some decisonmaking so you can focus on your health ?
As well as going to your GP to get pharmaceutical help so you can sleep get the BCNA My Journey Kit as being informed puts a measure of control back into life. I Found the information invaluable especially the suggested questions I could ask.Also at the back are other resources you can tap into - I found down the track the Cancer Council Cancer Connect Line excellent at a dire moment and also information on local breast cancer groups helped too.
Take someone with you if you can at least until the numbness subsides and you can think and remember stuff. Either yourself or your support person write down what you are told - good records are important.
Stay online as we will all do our best to help you get through - you are not alone and have our support now too.There is usually someone around 24/7 as many are night owls including a special group with that handle - good to have around on a sleepless night.