Confused?

Just found out I am pregnant, I had my second baby 1year and 11momths ago but I would still leak alittle milk I talked to my doctor and he said it takes up to 2 years or more for it to stop but now that am pregnant is the leaking suppose to stop because I am still leaking,does it mean I’m having a miscarriage if I’m still leaking?has anybody has a similar experience?