Setbacks like that are really discouraging, but mommies, while amazing, are human and make mistakes.
You just have to get back on the path and keep walking the way you think is best.
I think that walking a path in the grass is an excellent metaphor for parenting. You go the same way enough times there's an obvious path that they can follow as they get older and more independent.
I also think that it's okay to set some limits on breastfeeding once it's a secondary thing, she's still getting the physical and emotional benefits, and you get some much-needed space. But if you're not comfortable doing that there's obviously no obligation to.