Its up to you. I live a fair way away from my parents, and fortunately they were visiting the day after I found out, so I told them then. Otherwise it would have been by text or phone.
If you think that was best for you then thats the way you should have done it. You're 23, not a child anymore. She might be concerned, but Im, sure she'll come round.
Good luck honey

I know its hard work
xxx