What Should I Do?

I work at a spa and I’m a LMT my boss is an RN/cosmetic nurse (she does Botox and iv hydrations and things of that sort), well the flu is going around and she stressed I can’t miss any work and insisted of giving me zinc. We offer zinc in IVs but she didn’t have time so she said she was going to give me a zinc injection and stressed that she was allowed to do that. I trusted her because she’s my boss and a medical professional. Immediately as she gave me the injection in my right hip I was in excruciating pain and it felt like my entire leg was in a muscle spasm/yet paralyzed for 4.5 hours. I ended up in the hospital and they said there is no case where injecting direct zinc into a muscle is okay. I was told my tissue and muscle could become necrotic and I had to sit on a heating pad for days and could barely move my leg. She’s acting as if nothing happened now (she was apologizing and telling me not to tell anyone after because she wasn’t supposed to) and idk what to do.