Question for parents about my 4 month old?

My 4 month old was diagnosed with a viral infection that has caused little red bumps / rash all over his body. The doctor gave him a stomach soothing medicine for gas and said the infection and rash will clear up in a few days and it had to run it's course. He said to try Pedialyte. So I picked up his medicine... show more My 4 month old was diagnosed with a viral infection that has caused little red bumps / rash all over his body. The doctor gave him a stomach soothing medicine for gas and said the infection and rash will clear up in a few days and it had to run it's course. He said to try Pedialyte. So I picked up his medicine and Pedialyte. For a day now he only wants Pedialye every 2 hours. I've tried formula but he'll maybe drink an ounce so I give pedialyte and he takes it instead. Is this normal? I'm worried that he's not getting enough formula. Has this happened to any other parents? If so, when did your baby want formula again?
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