too hungry?

Laura
So my 10 days old baby girl literally won't stop wanting to eat. She just nursed for 50 minutes, got a diaper changed and then starting throwing a tantrum about 20 minutes later to be fed again. It's not like she's just laying there with my nipple in her mouth. She is full on feeding again. 
Should I be concerned there might be something wrong or is this normal?
Update: she fed 4 times prior to the 50 min feed, and now took 1oz of breast milk in a bottle because my nipples can't even right now. Even still, she won't knock out! 😳