Girls, good day. My son has white spots on his tongue, I examined his …

Girls, good day. My son has white spots on his tongue, I examined his mouth, there are also white spots under the inner cheek, and on his gums ? One after another, I can barely walk. The pediatrician says just to let him sleep with baking soda solution. Is there anything more effective than that? Some gels or ointments. It's kind of thrush, I'm always panicking, the pediatrician says nothing serious, just rinse it. Can you advise how you treated children's thrush? Thank you for your answers ❤️