DD started sleeping through 7pm - 4am at 9 weeks and was consistently doing 12 hours straight within a couple of weeks. She would only have 4-5 BF a day too (4 usually, her lead - not mine!!) when that all happened so I was a bit concerned but she was fine. She still had plenty of wet and dirty nappies and as we'd had feeding issues, she was frequently (always?) offered EBM top ups until about 16 weeks anyway so she was getting enough milk. I must say her morning nappies were always huge though.

I can't help with the draining though as DD took ages (40 mins or so at that age) to have a full feed for quite some time.

Good luck with it all and enjoy the extra sleep!