I agree the nurse absolutely should have answered your questions about the medication or gotten a doctor to answer them. It's just inexcusable behavior on her part.

Did the script say "P.R.N?" PRN means "as needed" in medical terms. It's an abbreviation for "pro re nata." Just for future reference.

I've also found that, for me, naproxen (Aleve) works much better than opioids. Opioids just make me feel very, very sick (from nausea). If they do help with the pain relief I can't tell over the nausea and vomiting.

But, yeah, YMMV.