I am still sick and so weak

Pity me. Before the flu is healed, I got diarrhea & vomitted heavily until now. Mummy and daddy took me to the hospital for IV drip. But still it doesnt resolve the root cause. It just to rehydrated my body. According to the doctor, I have viral inside my body that is now going to the 3rd phase that is my tummy. So the more I purge is good in order to get rid of the virus. But it has been a week I dont play like usual, I sleep a lot and I feel so weak.