Hi My 2week Old Daughter Seems To Have Severe Reflux

Hi my 2week old daughter seems to have severe reflux not to the extend of throwing up but after a feed I can feed her reswallowing something which I take is heartburn then she screams in absolute pain arching her back I can feel her stomach like cramping when this happens she can scream with the pain for a couple of minutes then she ok only for it to start all over again she is on infant galvison which does not seem tone working we are also keeping her upright after feeds etc . Is there something else we could get thanks