Hello! I have a question and am very worried. I've been sick for three…

Hello! I have a question and am very worried. I've been sick for three days now - cough, runny nose and what I eat and drink is making me vomit. Almost nothing I can eat. And the child has severe pain in their stomach sometimes like a stone. I went to the doctor, they prescribed an injection for coughing and so on, and a system for me because I don't eat anything, there's glucose, ascorbic acid and di-sol. Well, there are other medications too. But I still feel like I'm vomiting everything I eat. And I'm afraid that my little one might be hungry? Who has been sick at 2 or 3 months old