Police training and pregnancy

[wondering123]

So, I have been given a start date for British Transport Police of 30th April. Obviously I will be on training etc. As we didn't know how long it would take for an intake to come up in the area I wanted, me and my partner agreed I would stop taking the pill after my next period(next week). Now I have no idea what to do, I would love to take this job, but I am also so ready to start a family and was getting a little excited about coming off the pill. We agreed we wouldn't plan when we need to have sex and all that, we would just see what happens.
But im wondering if anyone knows what will happen if I was to fall pregnant within my training period?