5 mo DD who used to earlier feed for atleast 20-25 from both breasts now only does a 5-7 mins feed. She burps in 30 secs after coming off anf if I try feed her again, she cries horror. Her gaps between feeds use dto be 3 hrs and now they are about 2.5 hrs. She is more fussy and irritable in the day as well. Any advice or thoughts are appreciated.