All afternoon and evening my four week old baby has just fed, cried, been upset, wriggling , slept for five minutes a few times, fed again. Fed for ages then acting hungry an hour later. Breast feeding so she is hurting me as when she's fed the last few times she's coming off every few minutes and struggling to get back on chewing my nipples.  It's 11pm worried she's going to be like this all night 😢 just wish I knew what was wrong when she's upset ...