Help! Fussiness and crying while feeding

My daughter is 4W3D old. And for the last 3 weeks she starts to cry unbearably when I try to feed her from one breast. The sides keep switching, some days she cries when I give her the right side other days it’s the left side. I thought i had an oversupply, so I did some block feeding... but I don’t think that’s it. I pump about 60-80 ml in 5-7 mins which is not a lot. My daughter doesn’t feed for more than 10-15 mins per feed and it’s torture for me everytime because she just keeps on crying. She is hungry and asking for more but as soon as she takes the nipple in her mouth she howls! Pleaaassee help!