Thanks everyone, well we decided not to wait and nick took us to the vets...
the vet thinks she may have injured her leg slightly although she can't be 100% sure whats wrong with her...
Her tum felt fine and shes not ulcerated although there is slight issues with a molar (although the vet didn't think it was bothering her)
She has also put on 600grams since we last went which is fantastic!! vet was chuffed.
Vet gave a stimulant, some pain relief and some recovery for us to administer, she was very well behaved in the vets.
will keep updated as I shant be going to bed today but I have such a full diary at work so pro plus for me tomorrow!!