Breastfeeding - Confused!!

Hey ladies,
So Lilah is almost 6 weeks old, she has been feeding 4 hourly since the day she was born (4 hourly from beginning of feed) and has been sleeping and growing well.
In the last 3 weeks she is getting quite upset between feeds, and isnt very good at bringing up her wind. But generally she has been a really good feeder, and sleeps really well.
In the last 2 weeks, I am guessing she is hungrier, and is having to have both sides in a feed. As soon as my milk stops flowing freely, she gets frustrated and pulls at my boob. Once that happens on both sides she gets angry and acts like she is still hungry, but she is really tired by then so i cant figure out if she is just wanting to suck cos she is tired, or if she is actually hungry.
So pretty much every feed (except for 2am feed as my boobs are full, she only wakes once at night) she is finishing both sides and is still hungry (i think) but I cant for the life of me get her to suck actively enough for more letdown.
I guess after all this rambling my question is how do I know if she is still drinking, or if she is just sucking.
If anyone can make any sense from this gobbledygook and can offer any other advice that would be great!
By the last feed of the day my boobs are in agony and we are giving her EBM from a bottle instead. I didnt manage to BF DS, and I was feeding DD1 6 years ago, so cant really remember details!!

I agree, feed her a little more often during the day, every three hourly. There is a 6 week growth spurt as well.

Was my first thought too. We generally fed (still do) on wake-up then when she starts getting grizzly she feeds to sleep. And before it's suggested by anyone, no it hasn't created any 'problems' or 'bad habits'

Up until around 6mths, if she didn't demand a fed, I'd always offer it to her atleast every 2hrs during the day, or 3hours maximum. More feeding during the day can reduce feeding overnight too (not that that was always the case here )

I'd give it a go for a while, see if it makes any difference in her behaviour. Remember the more you feed, the more your boobies will produce and it shouldn't take too long to see a change (if it isn't something else of course).

I just wanted to add that I found the 6 week growth spurt hard hard work! My nipples hurt, I was so tired I could hardly see straight and she just kept sucking! Even when I knew my boobs were way beyond empty, she kept at it for days

The good news is that once it was over (it lasted about 5 days) things have been pretty easy. She's sleeping longer, which after nearly 2 months of no more than 3 hours sleep in a stretch, to get the occasional 5 hour sleep is bliss!!

So do keep at it, it gets easier

thanks for the advice ladies. my mw told me to try and feed more frequently too, which i tried. but the problem is that she is up for an hour and a half, then asleep for two and a half hours. i tried waking her after an hour and a half but she wouldnt feed properly and just wanted to go back to sleep.
The empty boobs thing seems to be only happening in the late aftenoon/early evening.
mw is coming tomorrow so will try talking to her a bit more about it.
thanks

What if you try expressing when she goes to sleep so it's kind of like you're feeding every 2 hours? Then you've got something to top up with too if she's still hungry.