I feel for you too OP.
I thought I missed something with the Oreos, but you are right. Autocorrect is kind of goofy.
Do your best and ride this one out. The truth is, after a couple of decades in this field, there seems to be no shortage of crazies with whom nurses must interact. It's hard to balance compassion and caring with a reasonable level of compartmentalization, but that's what you may have to do. You are a professional. As such, you can't let the unprofessional stuff sap you.
You legally covered yourself, and as long as it wasn't anything questionable in terms of safe or appropriate care compliance in following physician's order, and you documentated appropriately, you should be OK. Check with a reputable legal person if you think you may need to do so. Then move on. While you are carrying out what you are doing, if you have to start looking for another position, so be it.
But I am telling you, I have yet to work anywhere in any area in nursing or healthcare where there was not some level of "craziness" and reactionary nonsense. Do your best for your patient, family, and your own practice. Cover yourself legally, and then move on. It is impossible to please everyone, regardless of how hard you try. We say it, but as nurses, sometimes I don't think we really believe that that is is impossible to always please everyone--somehow we think on some level that it is possible. When it happens, it's great, but it is not always or even regularly going to happen, depending upon the situation. And people have so many complex issues going on. Half the time you feel like a shrink or a referee, but you really don't have too much time for any of that kind of thing in light of everything else you have to do.
Start planning a vacation and schedule some getaway days. Sounds like you need a break.