I'm going to challenge my mother's spiritual beliefs
Why do you want to challenge your mother's beliefs?
My mother always says she is praying for safe travel for me, but I find her words and practices to be hypocritical.
Having someone push their spiritual beliefs on you can be quite frustrating. It's okay to not share the same beliefs. You could try talking to her nicely about it first though.
I tried to talk to her nicely and she prayed louder that it became unbearable.
You should leave if she becomes unbearable but I'm sure she does it in good faith. Remember, she is praying for your safety so it's not like she's doing it to hurt you.