The name of this movie

Girl’s healthy mother dies of heart attack. Toxic report she overdosed on alcohol and pain pills. Girl finds an old phone. She makes contact with her dead mother hours before she dies. She keeps calling trying to convince her to seek medical help before it’s to late. She call a ambulance to go to the home. She ask her boyfriend to check on her mother. The Sheriff may be involved in the murder . He was ringing the doorbell when she spoke to her mother