Burping of baby

Hi, I have some questions on breastfeeding and burping of baby. I have been directly latching my 6-week old baby. Recently she has been regurgitating milk and has a hard time burping after feeding. I was told that it was gas / wrong posture when breastfeeding and burping. What can I do? I I am wondering if I need to bring her to a paediatrician / tuina.