I am sure it wasn't without warning. You were feeling bad for a while before it could happen.
I really would suggest to not "try" anything right now, but to get over the break up and to do everything to feel better.
"Self-abandonment. That is the secret. We have to abandon ourselves to the state, in our love for the state, and in so doing live the life of the state and no more our present state. And to make the state alive, one must become it."
Neville Goddard ~ The Law and the Promise