Wagtail
Horse servant
What others have said. I think it is a mixture of new yard and a saddle that probably doesn't fit. Have a read up of saddle fit whilst you are waiting for the saddler to come and don't ride her again until after it has been checked. There are some obvious signs that a saddle doesn't fit such as that it should sit horizontally on the back when viewed from the side. Imagine a rider sitting on it. Would the saddle tip them backwards or tilt them forwards? This will immediately tell you if the saddle is too narrow or wide, but other things such as bridging etc are harder to spot and need an expert.