As far as nursing that sounds just about as interesting to me as teaching; which it never really has before! I suppose I always thought of nurses as those who give the children their shots and leave, but I see there is so much more to it then that, whether it involves children or not and that seems extremely interesting.
This doesn't even touch the tip of the iceburg of what professional nursing entails. It's kind of like saying a mother changes diapers and leaves. No, quite a bit more to it than that. Though admittedly, the public often doesn't know exactly what it is that we do.
Long ago, nurses were people, usually women, that assisted doctors with things in their quest to take care of patients. Nursing has evolved into a separate and unique profession in its own right, with its own body of research and scope of practice. Sure, we work together with other members of the health care team. But our focus is on the patient's response to their illness. And in order to get to each patient's response to their illness, we need to delve into a lot of other things about any given patient. This is called an assessment and as nurses, we assess all systems of each patient and family, etc. Then we plan the care and intervene with whatever it is the situation calls for - that could be teaching or any number of things. Then we evaluate our interventions using patient feedback and other methods. There's a lot to it. It's called the Nursing Process. Here's a little glimpse into what it is we do. You'll probably find the website helpful if you want to look into it more.
http://www.nursingworld.org/EspeciallyForYou/StudentNurses/Thenursingprocess.aspx
FWIW, my experience with teaching and nursing is that these are very people oriented, "hands on" positions. Pharmacy is kind of a different animal, IMO. Sure, some pharmacists work with people. But in a hospital, say, their patient (and staff) interaction is pretty limited, at least compared to that of nurses (and teachers). You will probably need to look pretty closely at what type of person you are and whether you really want to be hands on or not.
I worked in a pediatric hospital early in my career. There is something special about it. I had an experience recently that really touched my heart as a nurse. Long story, but basically, I had occasion to observe a nurse working with a baby. They did not speak the same language, and the baby was afraid of the nurse at first. So the nurse sung to the baby (several verses of a song, tenderly like a parent would), and the baby stopped crying. The nurse was then able to do what he had to do with the baby and mother. It may sound trivial, but believe me, it wasn't. It takes skill to work with babies and children who are sick, in pain and/or afraid, especially when there are extra challenges like language or other things. And remember, you don't deal with just a child in the hospital or clinic, you deal with the parent(s) as well, so that's something that's important to recognize before you go into the field. My advice if you go into nursing would be to get a position in a pediatrics department to see if it's something you'd like to do long term.
HTH. Good luck.