Growth spurt at 10 weeks?

[Fletch3]

Recently we have been doing so well with sleep. He is formula fed and he would go 8-4 then 4:30 till 7ish. Now he is up every 3 hours ish. Could this me a growth spurt or a confusion in the routine? We had to go to a BBQ the other day so I bathed him earlier than normal and he went to bed a bit later. Could one day really have messed up his routine? He is a lot grumpier in the day too I've noticed and yesterday he did 10oz in one feed rather than 7. He is 10w5d. Thanks!

I always found it took 3 days to make a routine so wouldn't think 1 night would mess him up. I remember our dd regularly changed her routine over the first 8 months and just when we were thinking we were never going to sleep again she would go back to sleeping well again! They have regular growth spurts but she also had 'wonder weeks' when she would suddenly make leaps in understanding or ability and this messed with routine too.

Hope sleep returns to normal for you soon!