A spell to help make a decision?

i'm currently sitting my a2 exams and next tuesday i wudve finished all of them. i was planning on contacting my driving instructor to resume my lessons from 5 months ago (big gap cus my dad died late last year) and to aim to pass my test in as little time as possible, since i've also had some practise in the meantime. however, i spoke with my frend (whos with my instructor's collegue for our area) and sed that mine was crap and for me to switch to hers. she recently passed 1st time- 5 minors with hers whereas with mine, i've failed 4 times, the last time being 2 minors, 1 serious. Anyhoo, i'm stuck on whether to switch cus mine obv knows me and i'd feel better doing the test with someone i know. on the other hand, i dnt want my chances possibly jepardised/jinxed when i could go with someone who could potentially turn it around for me n who i could warm to in the weeks to come. Both charge at the same rate n drive the same make of car. anyone got any rituals/spells i could conduct to help me make my decision? my aim is to pass within the next month cus my bus pass is running out n i cnt afford to keep buying up �78 passes every 3 months -__- also, i'm sick of failing n i would love it if something great happened to me since the year began. Help!! x