I don't think you blew it; it's so easy to think that will be the last offer the one that got away, that we control it all (you might not have gotten the job or even wanted it, it might have turned out to be different than it seemed) and it's all our fault if it does not go our way. Sounds like you have enough stress at the moment, don't need to add a job change in there too. I think your mind-body did you a favor not calling.