Dd was only going every ten to 14 days for several months when she was little and primarily bf. she was very much like this. We had hold nurse and gp check her and neither believed there was an issue just that it was they way her body worked. She would scream through her motion and it was always huge and solid. And once it was done, she would be fine again.

If you are concerned ring nurse on call or move gp appt up. Given its "normal" for your dd, it doesn't sound like something to drag her through ed. more something I address with the gp. Kwim?