If it's that important to you, do a practice test now. Keep doing them (change the questions) and ensure you can pass before May (study what you get wrong after grading yourself). Then take them every day of next month so you can ace it in June. I don't have the authority to lecture you because I'm in the same boat (final attempt next week). Just speculative suggestions. But like that popular motivational video says, "if you want to succeed as badly as you want to breathe, then you'll be successful." Best of luck.

The main problem with self-checked tests is... they are self-checked. So even if I do things wrong, I will keep believing I've done them right, because I wouldn't know what I've done wrong! 'n,,n Through, maybe I could get one of my friends to check them for me instead, I would be able to actually progress with this... I have a lot of time to hit those books really hard, so there's that, I guess :P

Also good luck with your exam! Hope you can do better than me xD