One breast not producing, please helpšŸ˜©

Iā€™m 6 weeks PP and the past two days one of my breasts is not producing as much? Instead of 4 oz Iā€™m getting 1 or 2 oz tops. My daughter nurses from both sides. Iā€™ve noticed when I look in the mirror, my breast that is not producing as much isnā€™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??