So my 15 month old woke up this morning with a fever. Gave him some Tylenol and kept him home from…

So my 15 month old woke up this morning with a fever. Gave him some Tylenol and kept him home from daycare. He was fine for a little bit but now he doesn't want to walk at all, he kept grabbing his feet and whining looking down at them. I thought maybe his feet were cold so I put socks on him and that still didn't do the trick. When he does walk he walks super slow, which is unusual for the boy who runs circles around the house, and will stop and grab his feet. Could this be growing pains or something else?