It is common for babies to be fussy and to want to go to the breast more often at somewhere around this age.  A number of ideas and "names" for this stage have been suggested, none of them based on evidence - terms such as "appetite increase", "wonder week".  The most relevant question is: What has been happening in the last few days?

 

The consistent factor that I have found is that this is when mothers and their babies have several appointments.