I read Tarot cards. They can be surprisingly accurate sometimes (law of averages/ reader is a good psychologist/ querent unwittingly offers information), but it really is just a bit of fun - though not for you, obviously.
I can promise you that SHE CANNOT SEE ANYTHING LIKE THIS IN THE CARDS!
And even if she could, it would be horribly unprofessional to say so (for instance, if I saw/guessed something that worried me I might say - "You are concerned about your health, I think - it would be best to see your GP so that s/he can set your mind at rest, otherwise you will worry yourself sick about it.")
But as I say, even people who have deep faith in the accuracy of Tarot cards are aware that they help by allowing us to access information we are subconsciously aware of, in the same way that meditation does.
THEY DO NOT PREDICT. THEY ARE NOT WRITTEN IN STONE. NOTHING IS "FOR DEFINITE" ABOUT THE FUTURE.
Whoever she is, she has behaved appallingly. If she is a member of any tarot organisation (e.g. Tarot Association of Great Britain) report her.
And never mind about all of the glowing testimonials she has - they may be fake, and even if not, I can bet you that there are at least as many clients who would say that she is rubbish and totally inaccurate .
See your doctor. Get reassurance. Don't waste another moment of your life on this charlatan. She's on a power-trip.