A friend of mine (pilot's wife) is a physical therapist. She has not had any trouble getting jobs in her field. In San Diego, when we were there at the FRS for a year, she worked at a hospital, and in Jax, she is still there now after 2 1/2 years, she has worked at a rehab center. The only thing she had to keep on top of was her state license, making sure she was ready for the test when she moved to a new state each time.
Good luck!!
Regarding teaching contracts, you can quit your job any time you want, what the contract prohibits you from doing is quitting one district for the sole purpose of going to another (like before school starts, you take a 3rd grade job, when you really wanted Kindergarten, and then the week of school starting a Kinder job in a neighboring district comes up and you leave one job to take the other). I had no problem leaving my teaching job in Jacksonville in December (on excellent terms) and I am free to accept a new teaching contract in Corpus if I choose to. I actually told my administration before school even started that I would not finish the year (at the time, I didn't know exactly when I was leaving) and they said they wanted me to start the year anyhow (glad I did, since I ended up staying through December). If you get moved as a result of our spouse's job, or you decide teaching isn't for you, or you want a job in a different industry, it is not a problem to leave your job. The contract is really more of what you are entitled to on the job per the union negotiations. It's not like you are signing your life over or anything.
Also, National Board Certification is not a license to teach in every state. It's more like a master's degree, most (not all) states and/or districts give you extra money for having it (and many will help you get it- it costs about $2500 to go through the process) but you still MUST have a state teaching certificate to teach in the given state. In addition, to go through the National Board certification process, you need to be teaching a class for an entire year, as it is a yearlong (and sometimes 2 years if you don't pass all the parts of it, many don't) process. I was going to do it this year, but since I found out we were leaving, I couldn't do it.
Also, Nicole, just wanted to say that if teaching is something you do want to pursue-take the classes and get the state certificate if you can. Because having one state certificate will get you one in almost every state. I graduated college and got my original teaching certificate/license in Tennessee (never taught there, except student teaching), which got me a temporary certificate in California (then I took a test and got a regular certificate the first year), which got me a Florida certificate that I have now, which I am using to get a Texas certificate. So, it is worth it if you can do that. An emergency certificate that lasts only one year is only good for the one year, and after that if you don't do anything to turn it into a standard certificate you will have to start out all over when you move. Let me know if you have any questions!