Sounds like it could be reflux. it's really common in babies and happens when the muscles in the food pipe aren't yet stron enough to stop food coming back up. Reflux causes babies to become more clingy because they're uncomfortable, but most grow out of it by about 6months, you should get her checked by hv/gp though just incase.
There are lots of things you can try for reflux - keeping her still and upright after feeding, make sure she's not feeding too quickly, even thicker feeds such as sma staydown can help but you'd need to discuss it with the proffesionals first. Also keeping the head of the cot/moses basket raised slightly may help.
I know how much hard work and how upsetting it can be because my little girl has reflux too, I got sick (pardon the pun) of being told that it wasn't as much as it looked, but it really isn't.
if it is reflux and it's severe as my daughter has there are also medications which can be tried but I'm told that in most cases the above advice will work.
k8.x