probably not, my baby had a hard time burping then. Very long to get her to burp~~ i use to prop her i a seated position supporting her chin n pat her back upwards, but she will keep arching her head up. thats normal.
or you just place her against your chest n pat her back upwards. The key is to be patient.
My baby also constantly vomit all the way till 7 months!!! almost after each feed, as long as its not a real puke from the guts its ok n NORMAL.
dont worry... if you see he is in distress thn consult a pediatrician.