Uncontrolled crying and laughing. To do.

My sister is 21. She had some problems of depression from 14. It has become intense from July 2019. From march 2020 she is having some suicidal thoughts and crying episodes. From 3 July 2020 she is going through crying episodes with laughing at the same time. She can't control her emotions at that time. Other times she acts normal but gets scared of little things. She is also having eating and sleeping problems. She hallucinates herself trying to kill her in many ways and tried to commit suicide. And she also have massive headache all day. Sometimes she even begged to kill her. She was taking medicines for bipolar disorder but that didn't work. She is now taking medicines for increased prolactin levels. But that isn't working as well. Today she cried 4 times. The last episode lasted more than an hour. Please suggest want to do.