Hi Elliemae,
My son is 3yrs and 3 months, with GDD, hypotonia and learning difficulties.
He is making progress very slowly but surely. he can say 2 words, but he understands everything we say to him.
He has problems with walking etc...
With regards to toilet training, i havn't got a clue, as he doesn't let on when he has pooed, let alone peed, so i guess it could be a long way off, but then your dd could be indicating etc...
When i was last with the pead, they said that it could be a long way off.
I would talk to your HV or pead and see what they say.
Also, are you in reciept of the free nappies, if not, get on to your HV.
Sorry can't be of much help.
Butty.xxx