It is not a big deal AT ALL hun! Paige took 3 wks to get back to her birth weight and she was a nice big bub at birth too and fully BF at that stage. Take your cue from Miss J - she is calm, sleeps well, feeds well and does all the things that a healthy baby should be doing. You are doing fantastic at this BF caper, so tell the MCHN to go jump in the lake - Miss J is still above 'average' on the chart anyway.