I say this as gently as a noncatholic can to a catholic. Beware your sources of visions. Demons have been known to masquerade as angels of light. Other than Christ, who is truly risen, there is no Biblical mention of anyone sending a message to people after death. Beware you are not caught up in a great deception surrounding the end times. Test the spirits now as never before against the only unfailing standard we have - God’s Word.
Whoever or whatever . . .
—preaches any other Gospel
—does not confess that JESUS IS THE CHRIST; CAME IN THE FLESH; DIED ON THE CROSS; AROSE THE 3RD DAY . . .
CONSIDER anathema
I understand your concerns. The sources are Catholic saints and approved apparitions. The Church is very, very strict about these matters. There is a high standard for approval. Most cases are dismissed. We have a structured system for evaluating these types of experiences to avoid being misled by demons. I have complete confidence in these sources who have passed the test for credibility.