Kudos to you, D., for not leaving your daughter to cry. Lots of new studies have shown that it is potentially damaging to your little one to leave them to cry.
We had some sleep trouble ourselves, and kellymom.com helped quite a bit. Here's the link:
http://www.kellymom.com/parenting/sleep/index.html
also, there is a book called "The No-Cry Sleep Solution" that you could check into.
IMHO, 2 months is WAY too young to learn to self-soothe, and also for any kind of "sleep training." at that age, babies have no concept of "object permanence" so they don't even realize that you are still there when they can't see you. Is there any way that you can take her into the bathroom with you when you shower? A bassinet, swing, or bouncy seat? You can play peek games with the shower curtain or door that way. (peek games will eventually help with the whole object permanence thing, too.)
Hang in there, mama! Things like sleep *do* get better, even though it's hard now.
HTH!
ETA: if you check out a 'babywise book' can i suggest that you also look at 'the baby book' by dr. sears? they seem to be on opposite sides of the sleep issue, and if you take a look at both of them, then you can make a concious informed decision as far as what feels right for you. sorry, i always think folks should look at both sides of any issue before they try to make a decision, and i've heard that the babywise methods don't work for everyone. feel free to pm me and i can send you a link regarding that.