Hello! Did your underarms also turn black during pregnancy? Mine are s…

Hello! Did your underarms also turn black during pregnancy? Mine are straight up black ? I'm embarrassed to show my husband. I stopped wearing bras altogether. Never had this before. I bathe every two days. Clean and tidy. I'm careful with it all. And "there" too turned black ??? Is there any reason for this? Will it go away after childbirth?!