growth spurt at 5 months??

JK
I was expecting my little guy to have a growth spurt in a couple weeks more around 6 months but all of a sudden he is waking up more again, was so nice when I had to feed him only once at night, now it's every 3-4 hrs again and 5 am wake up call :-( 
Is anyone else experience this? I hope this isn't sleep regression and going to stick around for months