Make sure you get a solicitor and make sure and get them on time i.e. not the morning of the court.
Lord knows you sound remorseful but you need to make sure that the judge understands this too.
I was arrested on a Thu night and left out on £20 bail the next morning (all I had in my pocket). The court was on the following Wednesday and I must say, they were a long few days: all sorts of things go through your mind. But most judges are sensible people and see this kind of thing every day. Hopefully all will go well and it'll be a lecture, a (small) fine and a dismissal. I can also remember the ignominy of having to go to the Bail office in the court collect my £20 afterwards (which was promptly used in the post-court celebrations!)