Struggling- normal or ppd

So we have tricky days as I'm sure everyone does, baby is 9 weeks old and some days she just wants to scream and I cant find anything to calm her except putting her on the boob, and as soon as shes off it she has about 5 mins and the screams again.... on these days I get nothing done in the house, I dont get time to eat a proper meal in the day and I doubt myself continuously that I cany do it anymore, I think about just walking out of the house and leaving her there, but I never do it, I hate hearing her cry and feel so useless when nothing works

Is this normal? Does it get slightly better as they get older?