I had this and it was normal, apparently a sign of healing. There was so much of it too! As long as there’s no redness, pain or pus, and you feel well/no fever, it’s usually fine. You could always let your midwife know to be safe but it’s quite common
How much fluid is leaking? If its a lot please get it checked asap. I nearly died from Sepsis because of this in April when I had my son. More symptoms of Sepsis is high temperature and fever symptoms