It is so hard when babies wean before we are ready

You probably don't want to hear that my DS1 self-weaned at 14 months - when I was about 20 weeks pg. So it can happen that they feed through the pg at first, and then stop. However, it could also be a glitch in your case, and I certainly hope for you that this is what is happening. If you keep offering it, he might start taking it again. Otherwise, if he doesn't have any interest now, he might be interested again when the baby is born. This does sometimes happen and some mums unexpectedly tandem feeding a weaned toddler!

All the best hun