You a breast for three weeks. Mother nature is relentless and probably about 2 to 3 weeks after you stop breast-feeding you obviously. You are now going to be fertile. The pinkish discharge was part of these changes in response to estrogen
as were likely the endocervical cells present in your Pap smear
. If the cells were read as totally benign endocervical cells then there is nothing to worry about. It might be an issue if you were postmenopausal but that is not the case.
I wish you much joy and happiness with your new baby. You have plenty to be concerned with but not your Pap smear result.