Tiny is ill

Tiny is feeling very under the wather at the moment. She has been having a phantom pregnancy and has gone off her food and is very breathless and doesn´t seem to have any energy.
The vet has put her on medication to help. At the moment we are trying to get her interested in food but at the moment no luck, after a couple of mouthfulls she gives up.
I´m not sure if the heat of the past few days has anything to do with her not wanting to eat, and we are keeping her cool with plenty of water fights (she loves it).