can't get ahold of family

I work in a sub-acute unit as a supervisor. I just sent a woman to the ER with chest pain radiating to left shoulder, severe. Her son is the only contact listed, with only one number listed. I left 3 messages on his answering machine-telling him to call ASAP, but I didn't say what was going on-I thought that wasn't allowed with HIPPA. I remember one time a family member yelled at me and said I should have told them what was going on in the message. I should not leave a detailed message, correct? Anything else I need to do? (besides document that the son was called?)