A.,
it is SUCH a big adjustment with the first baby, especially the sleep part, or lack of. i don't know if you're breast feeding, but i'll tell you if you are, with my second child, i never got up once!!! at night. and here's why. she slept in bed with me and the few times she'd wake up, i'd nurse her without even fully waking up myslef, she would go right back to sleep and so would i. with my first child, i thought you had to get out of bed, go in the other room, sit up, turn on the light, change their diaper if it was at all wet, etc. with my second baby, who never pooped at night, i think because she never fully woke up, i just let her diaper get wet during the night and stay that way til morning (she wore cloth during the day), and we slept really well and in sync. the "family bed" is a different concept to people, i know it was to me, but it works great. just a thought - good luck! and yes, whatever you decide, i think she's too little for ferber. another option is just holding her til she falls back to sleep - babies that little need to be held a lot. take care!
PS my issue with ferber is not letting babies cry, babies DO need to cry sometimes, without question, it is how they "right" their systems sometimes. it is leaving them to cry alone in a crib that is not good for them in my opinion. they are trapped and cannot get to their sole source of survival - mom. my baby cries it out when she needs to, but she does it in my or my husband's arms. I think ferber works for parents, but i'm not sure it works for babies! Having said that, if a parent is unable to function because of sleep deprivation, that's not good for the baby either, and the parent needs some help to get sleep. i recommend the no cry sleep solution, there are a lot of good ideas in there that aren't so black and white.