I wish you well Pink. Perhaps your fear and all that was swirling in your head about this new experience that is upcoming is partly the reason that you had such havoc in your last visit. You were keeping busy so you could not discuss it perhaps.
I think that you can call your T but not expect him to mind read. You can call him and tell him that you are worried about this upcoming event and need ____________ specifically what from him.
I find it incredibly curious that this was not the topic of the last visit and assume that both you and he knew this was coming up?
At any rate Pink, I think you will do well. I do not think they will start you off with difficult patients but work you up to more difficult situations. That would be the responsible thing for them to do..and logical progression. I think you can be sensitive to patients that have similar issues or issues that trigger you. You may be able to bow off trigger patients at least initially. You will have a psychiatrist I assume there to work through your patients and your concerns that will provide guidance. You will not be left out there without support. They wish for you to succeed. You will also have your McWilliams

and other vast knowledge within your reach. And of course you will have your T and perhaps even work in visits as you can/need. (Do not get angry but know that has been offered to you genuinely, generously and caringly.) At this time of your professional development you need to accept the kindnesses that your therapist offers if indeed you wish to discuss your professional development. If you wish to work through your anger with the world (which is also valid) with him then stay on the same angry track.
You will indeed need to keep in mind that you are in an incredibly tamultuous (sp?) time of your therapy and separate that from what you wish for your probable short term patients in the hospital. I think you can do this.
Is your T supposed to be your person for professional development or just personal development? I am presuming your professional development is to be dealt with through the hospital you will be working at...though they may overlap. Excuse my confusion.
Perhaps your desires for success (and not failure) will help facilitate your taking your meds as they have been prescribed for the sake of your patients and your career. Taking your meds will also facilitate your personal therapy but at this point I realize that you might be more willing to take them for your professional progression. Practice taking the meds as needed and it should become more natural. You can work this through with your T. Just know that you will be discussing meds and what they mean to people in the therapies that you do in the hospital. Try to be able to speak from success in this area as it is so very important to the success of many that are hospitalized.
This experience could facilitate all kinds of success and change in you. I think that you feel confident in your skills and that you will have avenues for help in working through what might get mixed in with your own schtuff. I think this should be standard in a teaching facility.
I wish you the best Pink. It is incredibly anxiety producing which is normal... just do what you need to do to take care of you and therefore your clients. Be good to you Pink. I think that you have faith in your professional prowess. Go for it.