Hi,welcome to HCM!
Do not worry.
It is not a matter of mild or severe disease.
You have to avoid some food like fava beans, medicines ( there is a list!!) like sulpha
,etc,and naphthalene balls which are used in cupboards,etc-- these can cause hemolysis
. Also infections can cause hemolysis.
You have to consult the doctor for guidance and examination if she is found pale and not active.