The thing is, I cannot be masturbating if I am attending a school that is to prepare me to become a minister. If I screwed up and they found out I masturbate, I would get into very big trouble. I have tried to break the habit before several times, but the best I could do is 2 weeks – and then I could not sleep at night, so I gave in.
This is a difficult situation. If you've already settled on that particular school, are you sure it's the right one for you? It seems you've been able to reconcile your religion and your need to masturbate, and if this school finds masturbation and spirituality incompatible (which may or may not be the case), it could prove to be a tough time for you, mentally, physically, and spiritually. It seems to me that if you're committing yourself to an institution of spiritual learning, you're also committing yourself to that institution's ideas of what's right and what's wrong. If possible, find out more about the sexual atiitudes there at the school, and based on that, either re-evaluate your decision to go there or your decision to continue masturbating. If it's important to you on a very high spiritual level, it should be possible for you to abstain from masturbating while you're at the school, should that be the path you decide to take. Good luck.