Are you able to change your future even after receiving multiple tarot readings saying the same thing?

I've asked a lot of questions on my exam results, and mostly all of them say I don't do terrible, but not exactly what I am expecting. I need a certain grade to get into college, so I'm worried that now I'm not going to do as well as I hope, even with how much I would have prepared. I obviously am going to study, but now I worry it won't be enough. Is there anything I can do to change the outcome?

Edit: Would reaching out to a witch to get academic success be a good idea. I would do my own spells, they didn't go too well last time..