Toddler not feeling well

jessica

My 15 month old had a fever of 102 today - we have been managing with Tylenol. His fever is down but he keeps falling asleep in his crib and then waking up crying.. clearly something is hurting him and making it difficult for him to sleep as he usually sleeps the night. How long do you guys wait to see a doctor? I never know if i should wait it out...