my twins do this....when they do this it is because of air in their tummies....they swallow so much bloody air!! drives me crazy!!! and mine are 13 weeks! try burping her, I have developed a technique for checking for air...people think Im crazy but I never stop burping (even if it takes 30 mins :-( ) I put them sitting on my right knee with my right hand cupping their chin with my thumb and forefinger, then the other fingers under their left armpit and hold them up like that. Then with my left hand spanning across their ribcage I shake them (like dance them lol nothing violent!) quickly, if you hear the liquid in their tummies then you know thats air, if its silent then there is no air.
The only other reason they drink a bit then cry is when they are overtired, then I resort to anything to get them to sleep, they then sleep for 10 minutes and then wake up and eat maybe 80-90mls....it is really difficult with twins :-(