Nancy just asked in a comment how I did start making lingerie and whether I have any books. Let me answer this question here.
First: how did I start?
I started with a course on sewing lingerie that was held in the town I live. The woman that minded my children two days a week when they were little was on this course and told me about it, knowing that I sewed too. It was a great course, that thought me all the basics. Then I started reading information on the internet, bought a few commercial patterns, took another workshop with someone else. All this together let to the bra's I make now for myself and my daughter. So, it's a combination of lessons and trying, my first bra's did not fit as well as they do now. From a technical point of view: you must be precise when sewing lingerie, a few millimeters make a big difference in a bra, where in a skirt you won't see the difference.
And on books: I do not have any book on lingerie making. I considered buying the book "the bra-makers manual" last year, but thought it too expensive for my needs, as I read this book is mainly for those who sew for others.
Someone wrote me a mail and told about an Australian book "Making beautiful bra's" that deals with copying an existing bra. But I don't know this book myself.
And if you have an old bra that fits you well, you could just pull it apart and make a pattern of this to start with.
As far as English patterns go, I'm very sorry but I have no experience with those, so I can not recommend.
But I would be glad to help with a translation from Dutch or German for those who would like that. Just mail me.