Hello moms. I read about croup and am worried now. My baby has been ha…

Hello moms. I read about croup and am worried now. My baby has been having loose stools, frequent (mostly he poops once or twice a day, but now it's two times a day with yellow liquid). I thought it might be from his teeth. Then the stool settled down, but there was a rash on his belly (a red spot immediately, then redness goes away and leaves a small pimple). I gave him some blueberries that day and decided it could be from them. I stopped giving them, but the rash remained and new rashes appeared. I removed all allergens in his diet and mine, and the rash from his belly moved to his sides and chest. It's barely there, but it doesn't go