I stopped breast feeding 4 months ago but still produce milk. could that make ttc harder due to hormones involved with milk production? i do ovulate.

Probably not: If you ovulate then you should be fine. Breast milk (galactorrhea) is caused by high levels of prolactin. Prolactin usually causes infertility by preventing ovulation which is not a problem for you. Best wishes.

No: If you have started ovulating again then you should be able to conceive even if you are still getting a little mik production.