Nicholas' first fever at 20 months old

Poor Nicholas has his first fever. He was cranky sunday evening and then monday he was cranky again. Then at about 4pm monday we came in from outside and he just wanted me to rock him. He felt a little warm, but I'm not good at just feeling kids for fevers. So I rocked him for almost an hour while Celia was a good girl and looked at books (thank heavens she was being happy and content). He even fell asleep while I rocked him. So at 5pm I took his temperature and it was 102.3. By the way, toddlers don't like you to even attempt rectal temperatures. That made him mad. So we did the under the arm temp and also a temp with a digital pacifier (pacifier is less reliable).
So Jason took Celia to swim class alone and Nicholas had some motrin and fell asleep. He slept for an hour and then woke up after Celia was home. He didn't want anything to eat until I mentioned ice cream. That perked him up. He ate some ice cream and then a bowl of baked beans. Fabulous dinner - ha ha. He drank a big cup of milk and played and then went to bed at 7:45 pm with Celia (later than their normal 7 pm).
I woke him up for Motrin at 11pm and he slept well through the night. He woke up at 8am (celia woke at 8:30) and his temp was 100.7 with the pacifier temp (probably lower than actual). So more motrin for him.
He isn't having any other signs though. I'll watch the temp today and see how he is. So far no one else in the family is feeling this. Maybe its a slight ear infection or a viral thing? There could be a rash in a day or so? We'll see...