Help please

We have been doing really good eating every 3-4 hours and not falling asleep on the breast during the day. Today we have eaten every two hours since 8 am and starting at 4 pm its been every hour. I have my husband giving baby a bottle right now and he has eaten now 5.5 ounces and crying for what I think is more. He is only 2 months old. Am I dying up? Is he going through a growth spurt and cluster feeding? He is super fussy and won't calm down unless on my boob or bottle.