Okay so my LO is teething and we started him on milk a week ago. A couple days ago he's had fevers…

Okay so my LO is teething and we started him on milk a week ago. A couple days ago he's had fevers up to 103 with nasty yellow diarrhea and foul smelling urine. So we take him to the urgent care and she tells me it's a virus. Did a urine catch and said no uti. I have some medical background but with my own baby I'm kind of at a loss. Any advice is much appreciated.