Painful letdowns

4 months pp and the past day and a half my let downs have been very painful. I find myself gritting my teeth for the first one since it is seriously excruciating. The other two are painful but not nearly as bad. It's also worth noting I exclusively pump so I've tried turning the suction up and down to see if that would help and it doesn't make a difference. I don't have any clogs and I'm getting the same output I always get. This never happened with my son. Has anyone had any experience with this? Please for the love of everything tell me it gets better with time. I have an appointment with a lactation consultant on Friday. ?Hopefully she can help.