Colostrum changed to clear

I’ve been harvesting colostrum because my baby is being medically induced early at 36 weeks and I want to have some incase there’s blood sugar or feeding problems like I had with my first. Im 35+4 and have been doing it for 4 days now But my colostrum has turned very thin/watery and clear/whiteish. It was thick and yellow for the first 2 days. Does anyone know if this is still colostrum? Should I not save this stuff and just stop? I can’t find anything online about this