Breastfeeding is a funny thing... from the way it's pushed, you would think it's the easiest and most important thing in the world... I am a very happy bf'er, but it really gets my back up the way it is portrayed in NHS land. All the posters proclaiming the wonderful benefits, with none of the realities, it just sets women up for failure... Although I do think that is I was invited to talk to pregnant ladies, they'd probably be put off so much they'd never bother trying! Which wouldn't be my intention! 8 weeks is great even if you pictured going longer pre baby...
If I ever wrote a baby book, it would recommend slightly selfish attitude, put simply, do what makes you feel best! If that involves formula and rocking to sleep, then do it! Don't feel guilty about a single thing, after all, you have created a tiny person - and that's a blinkin' miracle!
I also ignore cradle cap, it does settle down in it's own time...
E doesn't really self settle yet, but neither did DS, but by 8 months he was a fab sleeper day and night, so I'm not worried..