Temp _ one min high, next fine

[minibmw2010]

DS (2 years) threw up some of his milk earlier. Since them his temp keeps spiking up to 38 and then a few mins later it'll be 34! This has happened a few times in last hour. his tummy clearly wants to be sick again as i can feel it contracting. He's v lethargic and refusing medicine. He was fine today. He had a small temp yday for about 10 mins and was fine after.

He's now asleep on me. Any ideas?

Dd had it last week. Lasted 3 days then she was fine. Very odd.

So after a tough night of high temp, no temp, high, etc he's now perky but his skin is v cold to touch and his lips a little purple looking?

Had him seen and its tonsillitis again