I read your story with interest as I'm a nurse. I'm sorry you experienced this traumatic situation. One expects to go into a healthcare facility to receive care!
There's a couple of points I'd like to make.
First of all, the nurse would've been following a prescription written by an MD. However, she should use critical thinking and assessment skills to observe the effect of the medication on her patient (you.) Some people can have adverse effects or the metabolism of a drug can differ depending on the age and weight of a patient. Meds can accumulate in your system and cause an overdose (which sounds like what happened here.) She should have recognized that the drugs were affecting you and reacted more appropriately than giving you more.
Secondly, you could have reported her to the nursing professional order. Here in Canada, you can go onto the nurses' professional order website and write a complaint in confidence. You don't even need to know the name of the nurse; just the location, time and date of the event.
I'm not sure of the timeframe that has passed since this happened - nor of the time frame that is acceptable to complain. Just know that if you do, the professional Order has an obligation to follow it up and investigate. I know, as I - and several other nurses on duty one particular night - were investigated for an incident that happened ( also in a maternity suite) because the mother had no satisfaction suing the MD. They pulled the medical records, interviewed me and cleared me as my actions had been appropriate.
And yes, you do deserve better and health professionals must be accountable.