Sending good vibes to all of my trans comrades 
As a reminder, be sure to properly give content warnings and put sensitive subjects behind proper spoiler tags. It's for the mental health of not just your comrades, but yourself as well.
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Do you have a new needle that you can compare it with?
They really shouldn't snap off. The tip can get dull.
And yeah, people get metal lodged in that layer. My dad has a chunk in his arm from doing construction. It never caused issues.
It won't get to your heart or anything. But it could damage tissue if it's sharp and possibly cause an immune response.
Stainless steel though, it's unlikely to cause immune issues.