I suggest circling when out on the field and just doing flat. Think of it as trying to get her bored. Just keep circling in front of a small cross country jump. Once she is calm, turn her into the jump and pop over it as if it’s no big deal. When turning make it a part of your circle. You don’t want to lose the collection and control you have gained or there is no purpose to it. This is what worked with my pony. Hope this makes sense and good luck!