Hello Jodie292 and thanks for posting, 

I am sorry to learn about your mum and can understand this is a stressful time. 

Grade and stage can sometimes be reviewed and change after breast cancer surgery, but I don't think it is all that common, more often things will stay the same so try not to dwell on it as thinking about this sort of thing can run you ragged. 

I spotted on another post that your mum's cancer was picked up through screening so hopefully the early stage will be confirmed and her treatment will be straightforward and successful. 

Try not to over think it and take things one step at a time. 

Feel free to call us if you want to talk anything over. Our number is Freephone 0808 800 4040 and the lines are open from 9-5, weekdays.

Wishing you the best,

Julia