My heroine is seriously ill with something that can sooner or later take her life away at any moment. She takes medication regularly but refuses to undergo anything hardcore (like surgery or chemo or anything that would make her better or cure her for good). I have not figured out what or where the kind of illness she has yet since i am not a certified doctor with enough knowledge about the human body but i do want to be specific when it comes to symptoms or medication and its side effects.
I also don't know how much that illness should effect her daily life. She's an intelligent teacher with exceptional understanding and memory. She is swamped with work and responsibilities that don't often involve her career as a teacher but it also greatly affects her health.
She's rich, so money isn't an issue. She just thinks that she should live her life to the most instead of undergoing harsh treatments and so.
Is there any type of illness (that preferably includes attacks such as asthma) that hinders someone's day to day life but not as much as staying to bed all day and is curable under extreme medication? (Cancer is out since she has to work everyday for being a teacher and other tiring stuff)