3.5 yo often complains (several times a week) of a tummy ache, sometimes means she needs a poo, but often just says it without any reason why. Doesn’t seem to have any problems with opening bowels, having a wee, food intolerances, etc. Is this a normal thing for 3 yo? Just last week nursery rang to say she was crying and said she had a tummy ache and I left work to collect her and bring her home. She kept saying at home she had a tummy ache but never got sick, no weird poos, etc.