The vet said that it is not serious and that I should make some
Chicken and rice (cook) and give it to her to eat.
My vet is going abroad tomorrow night so she told me to update her tomorrow..
I hope it'll help, and she'll be better by tomorrow night

We're not sure why is she tired and sleepy, probably because she
Just doesn't feel very well. She is wagging her tail, though

Thanks for the quick answers