One breast not producing, please help😩

I’m 6 weeks PP and the past two days one of my breasts is not producing as much? Instead of 4 oz I’m getting 1 or 2 oz tops. My daughter nurses from both sides. I’ve noticed when I look in the mirror, my breast that is not producing as much isn’t veiny anymore, like the other one is. Does this mean my supply to that breast could be stopping? Anyone experience this? Were you able to fix it, and how??