my friend thinks that no Magick can even come close to healing her because their so bad any spells/rituals/potions/charms that I can use to get rid off/ decrease them?
If your friend doesn't believe in it, then it might not be able to find its way in.
If she gives it a benefit of the doubt, then I suspect that the physical/situational anxiety can be mirrored in the magic otherworld by a missing piece in the soul that was torn off during a traumatic event. Shamanists call these "soul-shards", so it's not so much a spell as an action to retrieve that soul-shard and return it...which is more complicated than a spell.
It can also be mirrored in the magic otherworld by blockages in the energy body. Gray hematite is great at magnetizing those out.
But, if the source of all the anxiety in the first place is in the not-magic world, then that's like ladling water out of an overflowing bucket when the better thing to do is turn off the tap. Turning off the tab being, like everyone above said, proper therapy.