I'm so sorry to hear about your struggles, MetaphysicalDrama. This is a brutal process. I guess you have a couple options, neither ideal of course. One would be to get on the horse and try again next year. Work hard on your applications before next season, maybe strategically pick different programs to apply to, consult with your advisers and mentors from undergrad and your MA program as to what you should do. If you really think a philosophy PhD is for you and that you'd be unhappy doing anything else, that's what I would do. If you're at all unsure, or too frustrated with the process to go it again (and who could blame you), maybe it's time to make different moves and try for a new career path, maybe in one of the areas you've mentioned, where you could forge your way. Now that I think of it, actually, you could combine both those options -- keep trying to do a PhD while also building a career contingency plan along the way.
I really wish you the best of luck.