There's lot's of threads with people talking about being cut off, search the term "shut out". I've experienced it myself. Just like you, being told to go away. Left in a swirling blackness with no colour. No immediately apparent reason.
It's all in your mind. There's some part of you that just doesn't want to trip right now and is protecting you, if you look inside the answer is there.
The nearest we ever come to knowing truth is when we are witness to paradox.