Hello hoyt,
If you think your girlfriend might try to hurt herself, then I'm sure you know what you should do. She neeRAB help. Can you talk to her?
Addiction is a very serious disease, and the withdrawals from pain pills are horrendous! She is going to go through alot of pain, sweats, chills, diahrrea, possibly vomitting (but unlikely) - she won't be able to eat, or sleep. This will start on day 1 of not having any pills to take, and will reach its worst around day 3 or 4.
Stick around here, I'm sure someone else will give you some advice. There are some really great people here, who kow alot about addiction - Good luck, and I hope it all works out.
emsmom