Formula might make a difference, but it equally might not and you would be risking the health problems that sometimes accompany it. Once you make the switch it is hard to switch back again so I would try other avenues before making any decision to use formula.

My advice would be to buy a good ring sling, and use it all the time. At least then you can carry her and still use your hands. Also as you say you have heaps of milk, maybe it is coming too fast for her. Try to recline, even slightly, when feeding her and see if this slows it down which might help if her tummy is unsettled.

Also have you tried giving her a massage which might help her feel connected to you and also more relaxed.

I hope you manage to find a solution

T
xx