Hey Tom... Awesome news about your health man!!!
As for the porcelain, I am no expert to say the least but have been researching the export porcelains for a while now... Two things lead to me to believe it is Kangxi...
First is the location it was recovered in... Which for obvious reasons, I won't provide details other than what I have already said... Found some small denomination 1715 Fleet coinage and other related materials in the same area hence my reason for looking there.
Secondly, the base of Kangxi period porcelains is often quite a giveaway as the glazing typically did not extend all the way to the base of the rim on the bottom (which I can see with this piece but it doesn't translate so well in the pics)...