I didn't read the other replies, so I'm sorry if this is redundant.
It really sounds like your husband is overwhelmed. I don't know how he was with your first, but lots of dads find the feelings of helplessness and lack of control with a new baby to be very disconcerting. It makes them feel insecure about their abilities as a parent. If your baby is only one, those feelings would still be pretty fresh in his mind. If he had any negative feelings about the delivery or your previous pregnancy, those will be fresh in his mind as well. Babies are expensive, and he may be feeling like he can't provide enough to cover the kids and the lifestyle he imagined living with you. There are hundreds of other possibilities. This is understandable.
That said, he does not need to be treating you like the enemy. It's easy to blame the pregnant woman for being pregnant, but you are exactly right- you didn't impregnate yourself. Maybe try getting him to talk about his real feelings rather than all the negative aspects of having another baby. Talk to him about his relationship with your one year-old, how he felt about the last year, his financial concerns, what things he really wants to do but feels he can't with two kids. Let him know you love him and respect his feelings and want him to talk to you about them, but that the blaming and negativity are really hurting you and need to stop. It may take a while for him to get out from under the cloud. I'm reaching here, but maybe some special Daddy and Austin time will help him see the positives. There's nothing quite like having a good time with your baby to coax out a proud, happy Papa.
It may seem cliche, but some counselling might help. If you can't get him to talk about his feelings without hurting you in the process, a professional will be able to help.
I wish you all the best. Tell him this: if you have all your kids close together, then they'll be grown up around the same time, and you won't have to wait so long to take all those couples vacations and whatever else you always wanted to do together. Maybe he just needs to get some perspective!