Same as your case ar! Very fluctuated. Sometimes, my bb boy wake up every 2hours, even 1 hour tim. Sometimes 3-4 time a night. No sleep at all.
There are a few ways that seems able to improve the situation, please try to see if it helps:-
1. Bath in the evening- then use bb oil to massage - feed the last milk. BB will feel very relax and sleep.
2. Put him to sleep by the side.
3. Put a bb cushion for him to hold by arms and one on his back to pat pat to make him feels more safe.