Arm pits dark af

My underarms have gotten so dark. I have had laser in the past before being pregnant. They are like ashy dark and where I have wrinkles it’s like a noticeable line. I am getting maternity pictures taken in a month. I don’t know what I can use that will help or is safe while pregnant. First pregnancy. I am also finding a dress where my arm pits are covered but it’s hard. Please help. I have no hair just small strands like 3-4 which I pluck but I’m shocked how fast they got dark in second trimester.