Ouch, those kinds of conversations are always very hard. I am sorry it did not go well. From personal experience I would say, call your t and leave a message. Let them know that things have changed and you are in a downward spiral. Your doc may want you to come in early or have some techniques to get you through till the next meeting.
From what I have found, it is always the squeky wheel that gets the oil, so dom't be afraid to ask for help and make your t fully aware of what you are experiencing.

I really am sorry that the family conversation did not go well. I can empathize, my father thinks mental illness is a character flaw and my mother has spent the last week exhausting me with activities to cheer me up.