While the singer noted she is "fine now," the attacks were a result of her current When We All Fall Asleep Tour, which began in April and goes into November.
"I just couldn't take the fact that I had to leave again," she explained. "It felt like an endless limbo. Like there was no end in sight. And, I mean, it's true: There really is no end in sight with touring...Thinking about that literally made me throw up...I'm not a throw-upper, but I threw up twice, from the anxiety."