Or, at least I think so....
T is 12w and a few days and for the past 3 days is totally refusing afternoon and evening naps. He has been up since 630 (up every 2-3 hour to eat lat night whereas he normally sleeps 5-6 hours) and has taken one 1 hour nap and one 45 min nap that he woke up twice during. He is not fussy while awake - only when we try to get him down. We have tried 3 tunes this afternoon and he wakes up 15 mins later and won't go back down.
So how bad was the 12w spurt for your LO and how long did it last? The other ones have not been as bad for us.