Pooping more than usual

My LO has been pooping more than usual for a week now. She is acting fine except she does arch her back sometimes after nursing and cries. I called her pediatrician a office and they told me to look for signs of dehydration. She doesn't look dehydrated and is still nursing on demand, however she isn't eating solids as much as usual. She has been pooping about 4 to 5 times a day, sometimes in the evening as well. I think I'm going to take her in to the doctors tomorrow but did anybody else experience this with their Babies? I'm so worried, hoping it's nothing. 😓