16 week old will not burp!!!

Lindsay

I feel like I have tried every position possible to get my daughter to burp, but she just don't do it anymore. We used to have no problem, but in the past 3-4 weeks she just doesn't want to.. and screams if you even try. Then after not burping she will eventually spit up, & is constantly passing gas because she hasn't burped. Any tips mama's?