Dd diarrhea not going away

[Gigimoll]

So my dd is 9 months old tomorrow and for the past 5 days now any food she has will go straight through her. There's no vomiting and no mucus/blood in her nappy. It's like this vinegar smelling yellow diarrhea. I'm keeping her topped up with water and bottles but I've had to stop solids all together.
I went to see if I should give her dyoralite? Sp? At the chemist and they told me I'd left it too long and just see the doctor. So that's what I did. Only for the doctor to sit there and look at me and say "why are you concerned? What's the problem". So basically I'm the damn doctor.
Anyways.. I've read up it could be teething etc or even a temporary lactose allergy. So I bought some SMA lactose free milk to try her on and she just won't have it. I'm really worried about her. I'm having 4 dirty nappies a day. I've had to stop solids. She seems cheery and happy but surely it shouldn't be going on this long? 😞😖

You don't need to stop solids. Give carb rich foods

Did the GP ask for a stool sample? Is she uncomfortable at all?

If she won’t take the formula, try adding vanilla essence or Nesquik to it

Maybe teething? But diarrhoea can sometimes be a vicious circle, you have diarrhoea, so you lose your lactase (the enzyme which digests milk ) so you can't digest milk and milk then gives you diarrhoea, so you lose more lactase etc. Push the BRAT diet bananas, rice, apples stewed, toast. Plenty of clear fluids. Allow the lactase to build up again and the milk will be digestible.