@MarjyG I highly recommend a movie called "St. Agnus" (edit: OOPS it's called "ST. AGATHA"!)

it is NOT a blood and gore movie! 'tis Disturbing and it made me Queasy

In 1957, a homeless young pregnant woman named Mary runs away from her abusive father following the accidental death of her younger brother William. When her boyfriend Jimmy's band goes on tour, she chooses not to go with them and instead goes to a soup kitchen. There a nun offers her refuge in a convent where she must obey the strict rules of Mother Superior. When she attempts to leave the convent, they drug her and rename her "Agatha", locking her inside a coffin that they only open to feed her and reinforce their brainwashing.