Only you can decide if this is the right direction for you to take in your life. Right now it sounds like you might be in crisis mode and so you may be grasping at straws by turning to the nursing profession. On the other hand, maybe this is the best thing for you?
In any case, you came to the right board to do some research. This place has LOADS of information on the nursing profession and you can gain a better sense of what is available by reading through the threads and running searches.
By the way, all nurses (ADNs, BSNs, MSN.. etc) must receive basic training in nursing care (i.e. regular nursing) within nursing school and, depending on many factors, after graduation. So, there is no way around that requirement.
I too have a background in lactation education as well as chronic disorders. Now I am a student nurse. I am learning really quickly that nurses DO NOT think like the rest of the world. So although you worked as a lactation consultant, the fact that you were not a Registred Nurse might be a problem right after graduation.
The reason being, Registered Nurses have a scope of practice that exceeds what you and I were allowed to do in health education. In addition, Registered Nurses are taught to think differently compared to non-nurses who work as lactation consultants. On the other hand, given your background it might be possible for you to move
into Nurse Education and continue to work as a lactation consultant sooner then the average new grad once you have the proper education and training.
Please be sure to ask some of the nurses that work as Nurse Educators more detailed questions. Here is a forum to get you started: