I've noticed that LO tends to cluster feed, about an hour between  feedings starting around 5pm until her last night feeding around 10pm. during this time she also gets super fussy like I'm not making enough milk in that 1 hour.
Anyone else's baby have a similar routine?                
                             
        
Re: Night cluster feeding
Edit: I should add that a lot of kids cluster at night to store up for the night.
I could have written your post myself! Everyone I've talked to says it's totally normal, and will level out. I've heard that weeks 6-8 are the worst for this. We are in the middle of week 6 (a growth spurt week) and let me tell you, it's been quite a week!
Hang in there!
If she is getting fussy, have you tried feeding her more often? My daughter cluster fed from 6-9 every night. I basically fed her, held her for 20 minutes and put her back on the other side. (Are you 1 side feeding or 2 side feeding at a time?)
If you are feeding both sides, try one at a time. That way baby gets more hind milk which keeps her fuller longer, and your other breast gets a break.
You probably don't have a problem making milk, babies just feed like crazy for a window every day. If you aren't keeping up yet, don't worry your body will figure out what she is looking for soon. The more you latch her and the longer you let her suck, the more milk your body will make. (And don't worry, cluster feeding doesn't last forever.)