Hi Pamaris
Really pleased that things are starting to happen for you.
It might be an idea in a day or two to telephone the GP's secretary to check that the referral has gone, I would also ask for the name of the Consultant MIL has been referred to, then I would start ringing them, see if you cannot push the referral along a bit.
It may also be helpful to the Consultant if you write to him before your MIL's first appointment with full details of how MIL is, weight loss etc. They usually are grateful for as much insight as possible.
Best wishes
Cate