Not eating well

Maitri

Mu daughter is 6 week old. She was eating well before few days , but then she reduced amount of feeding she is ebf or some time she gets pumped milk from bottle. Initially she was drinking 3-5 oz but now she barely drinks 1.5 oz at one feeding.

Even when I try to feed her with my breast she just eat for less than 5 min only on one breast. she does not eat after it.

We have pediatrician appointment on Monday

Any suggestions please?