Does Islam Consider Sudden Personality Changes to Be Jinn Possession or a Mental Health Condition?

Assalamu Alaikum. I want to ask about a girl in our family. She was very innocent and did not want to get married, but her family forced her into marriage. After the marriage, her mental condition started becoming worse. Sometimes she suddenly faints, cries a lot, talks like a child, and behaves strangely. During these episodes, her voice also changes and sounds different. Her family took her to a spiritual healer (baba), and he said she should not stay in that house and that her marriage should end. However, doctors said she may be under severe mental and emotional stress and advised giving her a peaceful environment, taking care of her mental health, and even considering ending the marriage if it is harming her. My question is: From an Islamic perspective, how should we understand this situation? Could this be related to jinn or should it be treated mainly as a medical/mental health issue? Is it permissible in Islam to prioritize psychiatric treatment and counseling in such cases? Also, if the marriage is causing serious harm to her mental health, what does Islam say about ending such a marriage?