Confusion

I am supposed to call the hospital tomorrow to get an appointment to see the surgeon on Friday. Have organised things around that, including dear husband organising the day off work to come with me. Then he asked me what time, as someone has suggested coming to see us during the day. So I called the hospital to see if I could at least find out when the clinic would be - morning or afternoon. The nurse I spoke to couldn't quite see why I shouldn't just book the appointment straight away. Then she wasn't sure if the scan results would be back in time... but she made an appointment on the basis we could always cancel it tomorrow if it wasn't ok. The appointment was for 1.30, the clinic was already almost fully booked so I was glad I'd called today!
Ten minutes later she phoned back. There was another note requesting an ultrasound, so she might have to bring the appointment forward to make sure the appropriate person would be available. No problem, just let me know. Oh, and by the way it seems a letter has gone out with an appointment for NEXT Friday - a whole week away! If they can get me seen this Friday they will, but it might be that I have to wait for next week for some reason. She will call me tomorrow to confirm what's happening, which will be a pain as I realised after I'd hung up that I will be at the hospital anyway having the PICC line removed tomorrow afternoon, so I might not be here when she calls. I then went downstairs to find the postie had been and delivered the letter with the appointment for next week.
I don't want the appointment next week, I want it this week. I want to know what's going on, what the progress is, what the tumour looks like, and when the man with the knife will be cutting me up. I haven't just built the week's schedule around this, I have built my emotional stability around it, and I just want to run into the corner and weep right now. Why do the goalposts have to move? I was told weeks ago it would be this Friday and now it might not be... and suddenly the world is quite rocky. It's really unsettling when things change suddenly like this and what little certainty and ability to plan I have had is taken away.
I just want it all to be over...