We all suffer in our own way to learn to be stronger, or become victims.
That is the choice.
I don't think this is true at all. There are many different kinds of suffering, and you can not boil it down to them have only these 2 choices. Sometimes the suffering is self inflicted and that was clearly a choice. There is suffering caused through no fault or choice of your own, and it may be a physical form, or mental form of suffering. Some kinds of suffering are clearly not for the only reasons you list above. There is suffering from health problems, injury or disease you have no control over. Terminal illness or catostrophic conditions, are something we all face at one time or another.
In the case of the Mother and child and medication, why do you assume the medication causes more suffering, rather than relief of suffering or cure of the problem? When symptoms are controlled in any illness it usually results in some relief of pain or difficulty, such as breathing. The child may suffer from physical affects but the Mother suffers from anquish for her child. Suffering is a part of life, and some have higher or lower threasholds for how that suffering affects them. Some people just fall apart and others live everyday in some sort of physical pain and just endure it. There is suffering that never ends, such as the loss of a loved one, and we do not get stronger over it, nor are we victims of it, mouning is a natural process and so is death, which usually involved declining health and suffering.