If you had precocious puberty as a child, will that affect your reproductive health as an adult?

It shouldn't. Depending on the cause, there shouldn't be any impact. Only mccune albright syndrome requiring ovarian surgery in some for cysts might have some effect.
Prec puberty. Usually not. In rare instances precocious puberty can be due to physical abnormalities of the pituitary gland at the base of the brain. This could lead to fertility issues. It could also be triggered by adrenal disorders that can lead to irregular hormonal balance. These causes are rare.