am typing this on lap, on v pillow whilst babies doze. I should say that until they were 9 weeks old I used expressed milk (mine were 9 weeks prem, so I had loads in the freezer) for the 'last feed' of the day, I felt like I was totally exhausted and it meant that my partner could help with a bottle which he loved. I didnt want to go to formula, but the babies just got hungrier and hungrier. I think you are very lucky to get 3 hours sleep in a row! I can't remember when that last happened.
I woudl echo about swaddling. i discovered thsi late in teh play. babies always seem not to like it, but if you persevere and make it very firm they will sleep better and love you for it. try swaddling them during the day when they are relaxed and not fussing.
I was worried about housework etc and I have learnt not to worry any more.
How I do co sleeping is... I have a bed guard and sleep on the side of the bed that is closest to the cot, with the guard up. I lie on my side and feed the baby that wakes up first and let myself fall asleep (lightly). When baby 2 wakes up for a feed, I take now-sleeping baby 1 and put them in the cot then take baby 2 and feed them on the otherside. I always tell my partner that there is a baby in the middle by waking him up and he shuffles over to the wall side. This repeats when baby 1 wakes up. My other half is huge at 6ft 5 and its a smallish double, so if we can do it I am sure anyone can. Its changed my life as i was sitting up and feeding them and the lack of sleep was killing me. you can only do it so long.
Last night my partner slept in the other room due to an early start and I had both babies in bed and I flipped over feeding one on each side all night. Best sleep in ages.
I can count on one hand when i have had to tandem feed in teh night since we started co sleeping. I found that quite stressful as setting up was very disruptive for my partner and also both babies were very awake after all my faffing. During the day I only tandem feed.
Another tip is that I have stopped changing nappies with each feed in the night. I only change if they are poohey or very wet. I figure tehy will be sleeping 10 hours soon, so as long as its within a decent timeframe I dont change them. It wakes them up a lot and they feed for a lot longer, i find.
Sleeping bags helped a lot too (post swaddling)
Hope something helps. i still feed my babies allllll afternoon and they have been on a growth spurt for about 4 weeks if I was to belveve everyone...