Advice for boobs....

So I gave birth a little under 2 weeks ago and my son was stillborn. My milk came in 2 days after giving birth. I was instructed by my doctor not to pump them and they will dry up. But my boobs still leak alot. I'm wondering if I let it dry up will my next pregnancy be harder to produce milk. Anyone have experience maybe not breastfeeding and then still got milk with their next baby ?