My daughter is one month and a half old today. She got sick for the fi…

My daughter is one month and a half old today. She got sick for the first time today ? First fever, vomiting, bloating… I can't find myself anywhere, I slept all day and didn’t eat anything except her breast. The doctor prescribed medicine, says it's intestinal infection. We did enema. But I don't even know how to help, besides giving medicine. My heart breaks. Has anyone had this? How long did they treat it? How was the illness?