what you should do right now is to go to www.llli.org. find a group near you, or in your town. you might have to take a look at a map or something, or just keep looking at the list until you find a group that is close to you. attend a meeting, with your husband if possible. talk about your concerns; you might find someone in the group had the same issues. (that is the norm!) - if not, you will find the group will have a huge amount of resources so that you will be able to figure it all out.
just because you had problems the first time doesnt mean you will have any this time! some babies take to the breast easier (or harder). some babies are born pros and others arent. its not going to be the same experience, i guarantee it. it might still be hard, but its worth it isnt it??
it doesnt really sound like your husband doesnt want you to breastfeed, it sounds like he doesnt want you to go through the pain and frustration you went through the first time. formula is NOT easier than breastmilk, especially once the breastfeeding relationship is established. take as much time off from work as you can possibly get (if you work). get help with your older child so you can focus. DO NOT stress or get frustrated, just let it develop. dont suppliment if you are afraid baby isnt getting enough; just count wet diapers. anything 6+ a day is plenty. usually breastfed babies have 3 stools a day as well, but not always.
anyway, just have patience. be confident that this is what you want to do, let your husband know that even if its difficult you are determined to do it this time, and its ok. let him know that you know it was hard last time, on both of you, and you still want to give it a try because if you can make it work its so worth it.
and chances are, the la leche league will also be able to help you to figure out your problems! i just recently heard that most lactation consultants through clinics and hospitols are just nurses that have had a couple hours of breastfeeding training. they might never have even breastfed their own children (if they have any). so dont always rely on them (though some are good!)
the la leche league is good reliable information because the leaders themselves are required to have breastfed for at least a year, and most nurse longer. :) :) they will have real, hands on experience under their belt, as well as information from other moms they have known in the past..
anyway. good luck and im glad you are choosing to breastfeed this time ! !: )