Something you said really struck me - about not wanting to make his office unsafe. Hmmm. I'll have to give that one some thought....
I hate feeling the anticipation of a deep session, and I know I'd be feeling the same way as you right about now.
You are overthinking it, and leaning towards disasterous outcomes. I would be too...LOL
How about you try taking some deep breaths and associating this with finally being free of what you've held onto for oh so long? FINALLY! It might feel like a huge weight has been lifted off of you.
Easier said than done, I know....