New2Bumps...
ok...firstly, well done on battling on
it would have been so easy to give up already especially given the lack of help and support you've had from medical staff in establishing and succeeding with breastfeeding.
also, don't beat yourself up about what you could have done (e.g. skin to skin in hospital) - hindsight is a wonderful thing but it also sucks! you can't change it, you didn't know better so don't feel you've let yourself down
i'll admit i don't have personal experience in your situation, but from what i've read and from my own experience i'd suggest the following...
if LO is latching well and drawing milk i think you should feed him from breast only for now, to give him the chance to establish himself there and to get used to working for the milk instead of relying on the fast, easy flow of drinking from a bottle and also to give your boobs a chance to produce enough milk for him as breastfeeding works on a supply and demand basis. your LO can get far more milk by latching on and drinking than you can by expressing so by getting him over to this it will be more efficient for both of you
i think you should try offering him your breast (for now if he's getting cross with milk not coming out instantly you could stimulate your nipples to trigger letdown then latch him on so the initial work is done for him) and make sure he's drinking the fore and hind milk (fore milk comes first and is like a drink, hind milk comes after about 5-10 mins sucking and is like a meal and more fatty)
if he is giving hunger cues less than an hour and a half after feeding, put him to the same breast again as last time to give him a chance to draw the hind milk at the next sitting, but if its been more than an hour and a half put him to the second breast instead
if you feel he has drained a breast (you can't see milk round his chops when he pulls away, or milk doesn't come out fairly easily when you squeeze breast) then swap him to other side during that feed
the aim is for him to be contented and happy between feeds, alert when awake and to be gaining weight at weigh ins... if he appears content between feeds (and its normal as a newborn for him to want feeds approx every 2 hours so don't worry he's not got enough) then i'd try to only BF him, using formula as an emergency back up and then get him weighed after a week. his weight gain may decrease slightly but so long as he's still putting it on and not losing from his last weigh in then BFing is working
the reason i'm saying to try the big jump from half and half to solely BFing is you'll give him a chance to build your supply to what it needs to be and you'll drastically cut the demands on you by not expressing so much so you'll feel more rested and able to concentrate on him and you
if you're worried your supply isn't enough at the mo you can also boost it by pumping off what's left on the side he's just fed on once he's finished a sitting. your body takes 2-3 days to adjust your supply to meet your baby's demands and it's virtually unheard of for a body to not produce enough milk so give it a chance and i'm sure you'll be fine...have faith in your body
also, as your LO was premature he may find it extra tiring to BF at the mo as it is hard, tiring work for LO's so he may initially feed more often than every 2 hours (as well as cluster feeding once a day to build up his stocks). Put him to the breast every time he's crying for hunger and allow him to comfort suck as this alone increases supply due to the body response
I hope what i've written makes sense and is of use to you...feel free to PM me if you need any more input/support
x