As coolibrarian said, there is nothing you can do to control what people think of you and what they do. You did what you did and it's already done. However, the nurse reacts, there is nothing you can do about it, and you don't know yet at this point how she will react. May be it won't be as bad as you afraid it might be, but may be it will. Since you don't know, take one step at a time. Postpone your worry until you see the result. If she doesn't retaliate, there will be nothing else to worry about, and if she does, try to fight it in whatever way you can.

I understand that your national healthcare is heavily controlled by the government, but I lived in the similar system back in the Soviet Union. Though I am sure it was not exactly like the Swedish one, there were ways to get what you wanted. It wasn't easy, but it was possible. Whenever we didn't get the services we needed, we'd go through hierarchical structural channels though complaint processing. It took a good amount of assertiveness and persistence, but it worked. Not always, but often it worked and we'd get what we needed.

I am sure there are channels you can use in your system as well in the worst case scenario. Every system has it. But it's not time to worry about it yet IMO. When you don't know what will happen, the best thing to do is just to wait and, meanwhile, to focus your mind on something enjoyable.