mumof we're using formula and I am sure that does have something to do with it. You are doing amazingly with your bf though, especially after all you've been through with the hospital stay, so please don't feel deflated - you should be incredibly proud of keeping it up despite all the hurdles that have been sent your way.
We started bf-ing but gave up after just one week as Hannah was losing too much weight. I was a bit messed up in the head by an awful time bf-ing with Dd1 so as soon as we had a sign it wasn't working this time I reached for bottles.
With DD1 I did used to top up though - 20mins of boob for all feeds followed by a bottle. That did work well for us (after the initial hell!) and she gradually phased herself off the boob entirely by 4mths. Not saying that's what you should do but it is an option if you're struggling, and you would get the best of both?
Hannah had her 2am feed and then promptly puked a load of it back down my back! She wasn't interested in any more so I put her back to bed, but she didn't settle, just wriggled and fussed - not crying but just fussy. Eventually after an hour of that she did start grumbling a bit so I got her out, gave her about 1oz and she conked out until 7am!
Despite all the sleep I should now be getting I do feel crap - have got a stinking cold, a cough and as of this morning I appear to have conjunctivitis!! And dh has done his back in so I am on duty for both kids nd the dog - so much for weekends being a chance to handover some stuff!