u/Charming-Employ-7543

So my cousin(F27) is acting very strangely from her usual self. She is a teacher by profession but is at her home since the school has summer break. She is unmarried and staying with her mother and younger sister (20). Her father committed suicide in 2014-15. Her mother has some health complications from abuse she suffered from my other uncle ( her jeth or my father's oldest brother). So my aunt and my cousin have been somewhat managing their lives. The last time she came home to us was around 2 weeks ago. She has been under stress ( regarding my aunt's health) and also cried once randomly when she was with us during that time and told my mother she was worried about my aunt. Things were normal afterwards or so they seemed. She had been crying every night for past few days.

Now the main incident.

She woke up in the morning, had a normal chat with her mother( she went to her village for some reason).

Then at around 9 she left the house without her phone and slippers and locked it from outside. Her sister who was at home woke up to see she wasn't home. Got her gate opened up with the help of a neighbour and saw she wasn't home. The younger sister called her mother and then called us to tell us that the elder sister left home in that condition. My parents quickly went to her house to search for her( we live 10 kms away). After searching for a while we received a call from her mother who told that my sis had reached out to her through a stranger. We found out that she was lying under a tree near 1 km away from my house. That means she walked all that distance without slippers and was at that place. We found her and got her home. Later my mother told me about their conversation. So my sis was saying that she was seeing our grandfather(dead) and my cat ( ran away from home ) in her dreams. She was saying thank you to everyone and was being overly positive. Like very overly. She somehow became very religious. Keeps chanting hymns and is airheaded. Not listening to stuff and just saying tough times are ahead, stay happy and a lot of stuff. I am very scared. Not of her dreams but of her mental state. I could never have imagined things were this bad since she was the most level headed person in her house. She is not eating food aswell. What should we do? I feel like crying. My father was ( still is) an alcoholic and my parents fights have given me trauma with this kind of stuff ( both of my parents have left home in suicidal state of mind multiple times). I am not suicidal but with the way things are going on in my life I am scared I might lose my mind aswell. Please help