Anyone else dealing with postpartum rage

Hi all I’m really struggling with postpartum rage my LO is nearly 8 months and I am also pregnant with my second which I know hormones doesn’t help. When my LO screams which is all day and not screams because she’s crying she just does it for the sake of it because she has found her voice it goes right through me to the point I just snap. I feel so guilty afterwards and don’t want to do it. I spoke to my consultant and the antenatal clinic about this and all he could advise is go into a different room and try not to like it is the easiest thing in the world. I feel like such a bad mum because of this as I know it’s her way of communicating and I’m hormonal so my emotions are through the rough but I don’t know what to do. I don’t get a break every often and when I do it’s when I have a shower or go to my parents as my partner works and his days off he is either out or we are doing something. I just don’t know what to do and feel like I’m a failure as a mum because I’m being unkind to my child when all she is doing is trying to talk to me. I must look like a bad person when I snap as everyone says to me ‘shes just a baby’ or ‘she’s trying to talk to you’. As if I don’t know that.