I hope that were I to find myself in that position, I'd have the sense to say, "Oh, deary me, I don't know what happened, and I don't understand it at all! Please, Miss Abigail, burn those clothes and PRAY with me! Oh, Reverend Trask, please PRAY for me!"
The clothes part always gets me. "I'll need those clothes!" She knew that she had other clothes to wear in 1967, and she could reasonably assume that if she ever got back to her own time, her friends would not reject her for temporarily wearing strange clothes - so why couldn't she let that one outfit go?
I still maintain, however (until the next time I watch 1795), that Vicky thought she was in a nightmare - literally - so she though it was OK to say all the stupid things that she said.