Hello there,
Since the poster above me has already answered your post regarding the heredity I would just like to add that you should warn your doctor about this before your delivery date approaches. Malignant hyperthermia is condition which is causing fever and severe muscle contractions when you are under general anesthesia.
Because your specific situation, even the common treatment will not be apply able so I suggest consulting with team of doctors to find the best solution in case that you have inherited this condition from your mother, but let’s hope that you haven’t. Also, try to watch for the symptoms of this condition such as muscle aches without obvious cause. All other symptoms are connected with the pregnancy so it would be useless to worry about that. Good luck.