I'm sorry this has been happening to you. You are not alone. I live in VA. So I think I know what kind of storms you are talking about. As soon a black clouds start to gather I start to get that tight feeling in my chest. As the wind picks so does the fear. I to have a pony. He much less afraid than I am. It sounds as if you do equine therapy or give lessons? I farm set. The family I sat for this past weekend did not go so well. I got off of the animals schedule because I was fearful of an incoming storm. The animals did not cooperate. Goat would not go in their pins, the horses hid in the trees.I left their food fo when they had settled down enough to come out. The wind blew and it sprinkled. I was so embarrased. Fear of a storm had reeked such havoc on my afternoon.
My issues with storms go way back. Passed down from my grandma, to my mom, to me. I handle it better now than I used to. I just don't want to be out in it. Be careful out there.