Describe in writing what occurred during your shift, and submit your report to your manager. Be sure to keep a copy for your records. This will help to cover you in case there are complaints from the family (who do not know any better) or your colleague (who should be your ally, not your enemy.) Nursing can be a war, and it is a shame. But remember, you are a nurse, not a magician, and you did the best you could; in fact it sounds as if you went above and beyond.