Sleeping Pill OD

My friend recently tired to harm herself by taking 3 to 5 Ambien 6.5..she had been drinking that night too and was probably to the legal point of intoxication. Got her to vomit sveral times but did’nt really see the pills-it was only maybe 10 min between when she took them and i got her to vomit several times. She was really lethargic but able to walk with assistance. She went to to ER and they monitored. Could that dosage-3 to 5 or 6 of those 6.5 have killed her? She’s about 5′4″ and thin to medium build. Just wondering if anyone out there had similar experience. This is driving me absolutely crazy that she could have done something like this and I just live in constant fear for her safety. She was counseled and is going for more counseling…she contacted me after what she had done so I don’t think she really wanted to end it but I need to hear from anyone with similar experiences. It that just a cry for help? Is there a good chance she wouldn’t have been harmed? What is the likelyhood she would do something like this again. She says she has leaned and would NEVER do this again but i just feel like I don’t know her anyomre and I just worry constantly.