Any stylists on here willing to just give me advice😭

Okay, so I am 12 weeks pregnant, and with the permission of my OB, I dyed (well tried to dye) my hair rose gold with an ammonia free dye. My hair is already blonde so I didn’t need to lighten it any, so I just died the rose gold the way the instructions said to. The dye looked pretty damn good while it was on my head, everything looked normal. I was actually a little worried it was gonna be too dark because it was REALLY pigmented. I left it on the correct amount of time, I applied in small sections to make sure every hair was saturated, I did everything like I normally do. However, this time when I washed the dye out, there is literally no color at all. It literally lightened my roots a ton, but there is not even a rose gold or pink tint. It’s still totally, 100% blonde. How did this happen?? When can I try again? What should I do differently to get a better outcome??