BigSyke, same stud broke for me a while ago. I posted about it here:
http://zilvia.net/f/tech-talk/208466...ml#post2258372
What size drill bit did you use? If you used something big like a M10 or M8, then maybe try to use the M6 in the set that I ended up getting from Sears (link in other thread). As long as you haven't drilled until the end of the stud, you might have a chance of getting it out still. The bit will probably break like I described but you should be able to get it out once it's "stuck" and breaks.