burping pblm

hi mummy, evrytime aftr feeding milk, my 1mth old bb refuse to let me burp and also fall aslp too... she always fart so is it ok juz let her slp n not to burp ? and sometimes aftr feeding she burp already without patting her so shld i pat her to try getting another burp again? if feeding the milk halfway i burp her then another half she finished drinking nvr burp, is it ok?