I pump 5x a day. 20 min each pump but I exclusively pump I do not breast feed at all I have a quite slow letdown so I tend to pump longer than most but it's normally nearly done 15 Min in. What I was always told is pump until you aren't really emptying any more and if you want to increase supply keep pumping 5 more minutes I have a big supply so I get about 9oz per pump which is a lot I'm told. My lo is a gannit though so he likes to pig out and drink 8oz a feed. A couple of his feeds he will only drink 3oz (early morning ones) so I can stash some milk for later x
That's sounds a pretty normal amount! It's normal for you to get less after the first morning pump
I pumped 4 times a day (every 4 hours from wake up till last pump just before bed) as my supply allowed it. Each time was 30 minutes because that's when the machines shut off automatically. Each pump i was getting 5/6 oz per boob! (Hence only doing it 4 times a day) and that was way too much, my little lady has 5 bottles a day at 5 1/2 oz Each time, I would have a whole days worth of expressed milk in a Dr brown milk jug for the next days feeds and discarded what was remaining at the end of the day. I always made way too much, Each day I had 42oz sometimes more of milk total. She was drinking around 27/28 oz, Maybe do longer pumping sessions and see? I would do 3 minutes of the starting mode (can't remember what it's called but it's basically a couple of short sucks then a long one) then switch to the longer suck mode for the rest, you can have more than one let down per session, I know i had at least 2. The more you do it the more you'll make