If you search on Familysearch.org (it's free), you'll see the following dozens of choices for Mary Doughtys born around 1786
Then you'll have to try linking where the baptisms of all these girls took place with where your Mary Doughty married, and also check the names of any children Mary and her husband had who might have been named after any of the parents listed.
Good luck
Lizzie
ps. There's one who was baptised in Benington which is only 4 miles from Wrangle. The baptism date was 11 June 1783, parents Wm Doughty and Mary. The date is slightly earlier than you thought but it might be worth checking out.