Josie wrote:
I have just found out I can't register her.
I suck.

First, please don't say that you suck. Second, You are young and still learning and yes the breeding was wrong but learn from your mistakes and move forward.

Third and probably most important listen to what many of the poster have to say. Most of them are very very knowledgeable horse people and they can teach you what too look for in a horse and what to breed and not to breed.