Any amount you remove is great - 120mls is really good btw! - but don't be discouraged if you don't get that each time.
I never managed to get more than 4 feeds from 6 double pumps and for DD3 a feed was 90-120mls even at 9m. Given that at 6m I was ebfing a baby who had been on solids (had been ill so paed took her off them) and a 2 1/2y too (though she was only 2-3 times a day) I had a pretty large supply but I just don't pump well
.
Some tips to keep supplies going (but only if you feel up to it/are physically able to):-
Breast massage before expressing to help release oxytocin (massage towards the nipple).
Breast compressions during pumping (if you are wearing a nursing bra you may be able to clip it back up around the pump shield so you have hands free) can help increase yield
Hand express after pumping - I found I only got about 5mls or so per breast but it was really creamy looking so felt worthwhile to put in the effort (you may feel differently
)
Cluster pump - like cluster feeding but with a pump (10 mins pumping, 10 mins not, 10 mins pumping, 10 mins not, 10 mins pumping). This doesn't necessarily get more milk out then and there so don't be worried if you don't get much, it's to tell your body to make more in the future. It's also good to do before going to bed as it counts as more than one pump session so you can have a bit longer sleep before pumping.
Pumping at least once overnight - pref between 12-3 but if you are having sedatives or lots of painkillers before lights out you might not wake up - in which case see cluster pumping tip.
All the best and hope you get home soon!