Nervous breakdown and anxiety attacks are not something that anyone can control. You need a medical professional to provide clear directions, as it can backfire. What can calm one person with a nervous breakdown may make it worse for others. A person being injured on the street, if you know how to provide first aid is fine otherwise even they don't move a person, they wait for an ambulance.
Umar is a doctor so he knows the techniques which may help her but he wasn't her doctor so even he may not be 100% sure. Without Afsana's permission they couldn't even discuss her management techniques.
A mentally ill person should not be in a house where she is a threat to herself and others. That is dangerous. A person who is committing suicide and if you are not a negotiator you cannot try to talk them down. They may jump. Similarly mental health is not something that anyone can manage. None of them there are professionals except Umar and he tried to manage it.