30 weeks, Blood in colostrum

I appologize in advance for the long post. But this is the second post I've made about this issue I've been dealing with for the last 10 weeks or so. 30 weeks pregnant with my first child. I've seen my doctor AND a breast specialist but I was told they can't do any ultrasounds or mammograms on my breast until after baby is born or done breastfeeding because they said that it would be hard to diagnose things due to breast engorgment.