Welcome to Writing.com. The following is just my opinion and is only intended to be of help. First, you've grammatic error and typos throughout the piece, which could be cleared up by proofreading once more. It's a nice story, but needs more detail. The Mormon piece at the end is surprising and with added detail early on needn't be. It should lead the reader there, especially since this another family's story.
I write historical fiction about coming to America. Two of my short stories have now been published in anthologies. I've written a story of someone else's family too from very little facts. I had to do some research on my own, and I "filled" in details from the period and the history of the time, which enhanced that story immeasurably. I think if you add a "middle" section showing Priscilla's meeting her husband or being exposed to the idea of going to "Zion," how the idea grips her soul like those seeking religious freedom and boarding the Mayflower, you'll have an even stronger piece.