Hi there
Firstly, it is heartbreaking to go back to work & leave our little ones behind. Atleast you've been able to work half day but as you said, it is going to change soon
I've had my 2nd child 3 months ago & still have 4 weeks left with him but it's already stressing me out as I'm returing full day & will have to pump atleast 3 times during working hours. I also demand feed him & he feeds alot hahaha. He only stretches 3 - 5 hours during the night. During the day is a different story but I don't mind......I just love it!!!!!!
Now to answer your question
You obviously know what the let down reflex is for & it comes extremely easy when bf baby but as soon as we put those pumps in work, it's a different story & not so easy to get the let down BUT if you don't get it, you won't express enough milk.
During pumping, if you manage to get a let down, the milk will flow out much easier. It's a case of tricking your breasts to release the milk even if it's not the baby suckling. If you battle to get a let down during pumping, you will probably battle to get a nice amount of milk out. Stress interferes with the release of oxytocin. You can stimulate the let down by applying warm compresses, thinking about the baby, breast massage etc.
Is there a reason why you don't have enough time at work? Are you just extremely busy or is it all they give you?
How long do you go before expressing at work since your last feed with baby & are your breasts extremely full before you express because if they are too full the brain will think that you don't need more milk because it will seem that baby doesn't feed alot anymore & will produce less milk?
Your breasts should always be as empty as possible because the empier the breasts, the more milk it will make.
You can buy fenugreek or drink the jungle juice if you want but even with alot of milkies, it won't help if you don't get a proper let down.
Sorry for the long reply!!!