Thank you for using our forum. My name is ***** ***** I hope to assist you today.
I am terribly sorry to learn about this situation at your hairdressers. Unfortunately, based only on what you have posted I do not see a cause of action that you could bring against the hairdresser for contacting law enforcement based upon your described presentation (you state that you were bleeding from the wrist due to a deep cut at work that had not yet healed, and were hypoglycemic possibly affecting your mood/presentation).
Contacting law enforcement is something that is strongly protected (there is a public interest in encouraging the public to call for help rather than try to deal with situations themselves and possible violent confrontations between citizens). This means that if you were to file a lawsuit against the hairdresser, they could quickly and easily defend the matter by filing what we refer to as an "Anti-SLAPP" motion (Anti-Strategic Litigation Against Public Participation) and not only have your lawsuit dismissed, but also get their attorney's fees paid for by you.
Again, I am terribly sorry to learn about this unfortunate encounter, and I am not dismissing the severity of the impact of this on you, but at the same time, I do not see a viable cause of action that you could pursue to recover damages against someone (the hairdresser or anyone else) for what occurred.
You may be able to revisit the merchant and explain the medical nature of the issue and perhaps there will be some effort to make amends (you say that you visit this merchant regularly in the past), and many people are aware of the fact that hypoglycemia is a true medical condition/emergency that causes altered mentation, and this may pave the way for a conversation regarding the disproportionate response that occurred (the police response rather than medical), but I cannot promise anything, I am simply trying to offer some potential resolution for you as I do not see a legal remedy for you based on these facts.