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St. Alphonsus Liguori in his work “History of Heresies and their Refutation” mentions the Protestant origins and absurdities of these charismatic practices. 

It may be worth showing your family the quote below.

It may also be worth simply asking them whether these practices are traditionally Catholic, such as being able to see similar things in the early Church. Since you ask a question, you do not come across as imposing, and it forces them to think more about what they’re actually doing, and the origins of it.

The people praying over you knowing your sins without you telling them (if I am understanding you correctly) is evidence of demonic influence. Sins that are unconfessed/unforgiven, the devils know. This can even be seen in the account of a famous Catholic exorcism related by Fr. Michael Müller in “The Triumph of the Blessed Sacrament”. It’s not right for them to be saying it so others can hear, St. Francis de Sales teaches that we are not permitted, for charity’s sake, to divulge our mortal sins to others (besides the priest and in other reasonable situations) so as not to give scandal to our neighbour.

Quote from St. Alphonsus:

“It is rather difficult to give a precise account of the doctrines of Methodism. Wesley always professed himself a member of the Church of England, and maintained that his doctrine was that of the Anglican Church, but we see how far he deviated from it in the ordination affair. Whitfield was a Calvinist, and some of the first Methodists were Moravians. Salvation by Faith alone, and sudden justification, appear to be the distinguishing marks of the sect. Their doctrines open a wide door for the most dangerous enthusiasm; the poor people imagine, from the ardour of their feelings, that they are justified, though every Christian should be aware that he knows not whether he is worthy of love or hatred, and this has been productive of the most serious consequences. If only the thousandth part of all we hear of the scenes which take place at a "Revival" in America be true, it should fill us with compassion to see rational beings committing such extravagances in the holy name of religion. I will not sully the page with a description of the "Penitents' pen," the groanings in spirit, the sighs, contortions, bowlings, and faintings which accompany the "new birth" at these reunions. It has been partially attempted in these countries to get up a similar demonstration, but we hope the sense of propriety and decorum is too strongly fixed in the minds of our people ever to permit themselves to be thus fooled.”

— P. 384-385

https://archive.org/details/historyofheresie00ligu/page/384/mode/1up