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I'm sorry to hear about your situation. It's a very good idea to keep a close eye on your situation and if you have any intestinal issues, to see a doctor immediately.
The main issue with any legal recourse is the lack of physical injury. The law does not give you recourse for "almost" damages. That is, you could have been injured, and but for your own intervention and discovery of the matter you were not. But the law does not compensate for this. To have a case, you need to have quantifiable damages. If, for example, you had to go to a doctor, had to have surgery, recovery, etc... you could sue for those expenses. And "pain and suffering" and "mental anguish" is usually a multiple of the actual quantifiable damages, based upon how long lasting that pain is and how identifiable the physical injuries are. It's a good thing for you physically that you have not incurred any symptoms of injuries from the glass, but on the flip side that means that you're not going to have any strong case against them for any amount of damages (other than "nominal damages", which is a small amount of money, say $1 or $10, that indicates that you won a case but you really didn't win anything of significance).
Again, if you do develop symptoms, you could have a case, but a necessary element of negligence is quantifiable damages, and if you can't establish the specific amount of money that you have been harmed by their negligent conduct, then you wouldn't have a case.
One other thought is that you might be thinking about "punitive damages". The Supreme Court has actually imposed a limit on punitive damages, which is 9 times the actual damages. So if you don't have any proven actual damages, 9x nothing is still nothing.
I know this is probably not what you wanted to hear, but it is the law. I hope that clears things up anyway. If you have any other questions, please let me know. If not, and you have not yet, please rate my answer AND press the "submit" button, if applicable. Please note that I don't get any credit for the time and effort that I spent on this answer unless and until you rate it positively (good or better). Thank you, ***** ***** luck to you!