I'm Aliza. I'm a BC patient and a Medical Librarian who researches for people on this site and elsewhere. I'm sorry to hear about your news. I hope you are comfortable and able to enjoy things.
In order to set your mind at ease, the first thing I might suggest to you is to see an attorney/have one come to see you if you're not able to go out (they do that often in such cases). You'll want to have made a will (last will & testament) and once you find an attorney that deals in such matters as this (even an ElderCare attorney might be a good choice [though you're not so old] but because of your circumstances), because they can be more helpful with regard to helping you include what should/shouldn't be included in a Living will (also want to be sure that your husband has the finances protected in case you have a protracted illness for any reason). Be very specific as to what you want/don't want. Very important. Things have come a ways since the time Karen Quinlan went into her coma though.
Before anything else, make certain that your treating hospital has photocopies of all your Health Care proxy information and make sure your Health Care proxy or proxies (if there are more than one) are all carrying their copies of this document on them in the event of an emergency, whether that be at your treating hospital or elsewhere.
You may if you belong to a religious community, wish to speak with your clergyperson at this time re certain religious preferences that you have. Various religions vary in their funeral practices and even in the same religion, e.g., Judaism, there are currently 4 distinct and a 5th denomination coming onto the horizon, so it's sensible in that case to speak to a Rabbi re your wishes. It is also good depending on your beliefs to ask your clergyperson to pray for you (i.e., put you on their list of sick people).
I myself, cannot think of anything else, but you may want to internet search as well, (e-how, dogpile [all the search engines combined into one]), but the main thing is to speak with a good attorney about how to properly proceed so that things are taken care of and you can relax.
Feel free to contact me if you have any further questions or anything you'd like me to research for you.