It's not abnormal just make sure you burp often. She might not be latching on completely so she may be getting air or gulping hard. Also pay attention to what you are eating. Remember what you take in goes into your milk. Some babies have a very sensitive stomach so although acidic foods may not bother you they may bother her.
My little girl did that. She's 3 weeks now. I had to burp her every 10 minutes. And at the end of a feeding. Now its every 15. She still spits IL a little but much less now.