Ceolic?

[Pollyputthekettleon45]

Hello.
I hope I'm writing in the right place, could do with some help on my DD who is 3.

I have noticed over the past few weeks her stools are mushy, a greeny/yellow colour, and complains of tummy ache just before. Occasionally she has normal coloured and solid stools. I just

It's half term where I live so I have paid more attention to when it happens after food etc.
Today's she eaten 3 small bowls of cereal (Cheerios and Whole milk) she is up at the crack of dawn so it's between 6am-8am.
Soon after she had eaten she went to the toilet and it was the mushy kind, that happend twice.
She has homemade chicken and veggie soup with a white bap and 1 slice of half and half bread, had a nap and was fine. She went for a nap and woke up, played then say about 1 hour after had diarrhea, but wasn't green or yellowy.

During the night she went to the toilet and passed a normal coloured huge (my DH said) stool. She has been constipated and is full of wind.

Rang the docs for advice and they have booked her in for a blood test as it sounds like ceolic.

The thing is, she has a really shit diet. She doesn't like anything, with DD1 at this age I could name at least 5 meals should would eat, I can't even name 1 for DD2.

She loves cereal, Egg, cucumber, those Peppa pig yogurts, pepper, carrots, pears, crackers and that's it. She's a picker at meal time. But would eat biscuits, cake and sweets all day if I let her, I don't obviously!

Could it be down to her diet? Or could she have coeliac? Or even dairy?