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It sounds like you and your husband aren't getting any alone time. If Rosa goes with your family to the mall, she probably gets most of your attention. Anthony could easily feel left out, get resentful, and then start to snap at you. You don't feel connected to him because there's so many other people around to distract you from each other.
Is there someone who could watch the baby on Sunday so you and Anthony could do something together that you can share? It would be best to stay away from shopping, because of all the financial stress you two are under. He will just be thinking about how much money he's not earning, and feeling bad. Does your gym have a racquetball court that the two of you could play on? Is there something that he enjoys that you wouldn't mind doing with him?
It takes quality time together to help the two of you focus on each other as lovers, not just parents.