When did your painful letdown go away?

My baby is a month old and ebf. I have a very forceful letdown that is painful. It lasts about 10-30 seconds. It's only the first letdown, later letdowns I only know happen because my baby starts swallowing faster again.

I have random letdowns if it's getting close to feeding baby and they are also very painful. Will it be like this the entire time or will it eventually become less painful?