Constipation with Potty Training?

tab890

Has anyone ever experienced this?  We've been potty training for a while now, and we've been doing great except with the #2.  She's gone twice on the potty, but the past week she's been complaining that her belly hurts.  She's been complaining so much about it we actually took her to the ped.  They agreed theres nothing wrong, just the constipation, but she continues to complain of it.  She has been going every day, but she just hasn't been herself.  Any recs for this? 

Thanks