Its just colostrum, and its totally fine. My milk never officially "dryed up". I had my last baby 5 years ago and have leaked ever since then. Im 28 weeks now and have started to leak a lot more recently, so much that I already have to make sure I have a thick enough bra on when I go out.
Your milk will not dry up and you will have plenty of nutritious colostrum left when baby gets here.