To be honest, I don't know if I would tell you see to a shrink or not. I suppose it depends on what message Jesus gave you.
Would that apply if we replaced 'Jesus' with 'Napoleon'?
Would the thought that someone would need to see a shrink if Napoleon was talking to them depend on the message Napoleon gave him/her?
Yes, if Jesus were replaced with Napoleon I would be immediately inclined to think the person is in need of psychiatric help. That is due primarily because I don't see Napoleon telling someone to love one another and / or to turn the other cheek.
Because I am a theist who believes that Jesus of Nazareth was God incarnate, I have no problem with the idea God / Jesus may have spoken to the person. The key, for me, would be the message. If the message was one of love, acceptance of others, tolerance, etc. then I would be inclined to consider it a message from God / Jesus. On the other hand, if the message was one of killing all those who do not accept Jesus the Christ as their personal Lord and Savior, or some similar message of violence, then I would be much more inclined to conclude the person needed a psychiatrist.
Yes, I freely admit I am mirroring my theology with the person's message however inconsistent, illogical and/or delusional it sounds. But I don't know what else to base my conclusions on.