Posting here for traffic as I’m desperate 
I have 3 dc. Dd5 Ds3 and Dd 5 months. My Ds absolutely cannot stand the baby crying. He full on loses his shit and cries, runs around with his fingers in his ears and often shuts himself in his room if she cries. It’s at the point now where she only has to whimper before he loses it. I’d say she’s a reasonably good baby and doesn’t really cry that much but I don’t know how much more I can take!
Has anyone ever seen experienced this and has any tips or advise? I’m desperate!! Thanks!