Sick toddler question.

We were just at the doctors.

He was 101.5 at noon

I got him Motrin at 12:30

At 1:05 he was 103.5

Shouldn’t his temp be going down not up ? Do I call back the doctors ? Go to ER ?

He’s two.

They said he has flu A & B I was waiting till after he naps to pick up his tamaflu and now I’m feeling guilty I didn’t just get it on the way home but he was so tired.