Re: Losing BF Support, small baby, not sleeping long
Co-sleeping is the best thing you can do for yourself and your baby, IMHO. 4 months is a big transition, as some other mamas have posted, and frequent waking and restlessness are part of all transitions. There will be more to come! Co-sleeping and nursing in bed will ensure that you both come out the other end of these transitions sane and healthy.
You may want to read The No Cry Sleep Solution by Pantley if you choose to nurse and co-sleep. Babies are capable of nursing while they're fast asleep, and that may not be what you want in the long run. This book will explain how to get more sleep while still maintaing a nursing relationship.
I don't believe that formula is a solution except for babies who don't have access to breastmilk. There about a billion studies expounding the amazing benefits of breastmilk. Anytime a baby gets formula, the baby is getting LESS beneficial nutrition. Period.
As far as support goes, please look into La Leche League meetings. Without support, there's very little chance that you'll be able to make the choices that are best for you and your baby. People who DON'T support breastfeeding are rarely convinced otherwise.