Lyric discussion by slider196 

The act that brings on the plague has something to do with taking a lover ("Domino motion/ jump starts when we touch") The singer can't help it ("I'm not always like this," "terrible weakness," "blackout," "I can't help what I am,") and can see that things will end badly ("save me from myself/ before I hurt someone else again")

Her predictions are correct: the affair ends badly ("It's all over in a flash," "What have I done now?" "My head hurts," "Oh dear oh dear")

Then, she's pursued by the tabloid media ("all over the papers/ and the TV, wagging tongues./ The artist's impression...") I think the "glittering cloud" is the horde of paparazzi photographers that follows her, wanting a good shot, a literal plague of follows her like a swarm of insects, each one wanting a little piece of her.

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