How to dry up breast milk?

How long after you stopped nursing your baby did you stop producing breast milk? I stopped nursing my son five months ago and am still leaking quite a bit. I tried googling it, but sometimes that’s not the best option! I just wanted to see if other mammas have had this same experience and or any tips to stop it. I plan to call my doctor in the morning to schedule a check-up just in case. Thanks in advance!