Aww CarrieV! Props to you that you were able to go a whole week! I take back my previous advice. If DH is going to stick his nose into your BFing business by bringing a bottle of formula in while you are working with your baby, throw it out and don't have any in the house. If DH buys more, throw that out too.
If you are having trouble getting him to latch, try switching! Sometimes in the evening, my DD won't latch right away because the milk doesn't come as easily and we end up going back and forth and back and forth until it's at a speed she likes!
You can do this mama! Keep trying