D. S., I read your question, and I can understand how you might feel. Sex is definitely different after having a child. But... it can be amazing, too. And I don't know you, but I think from what you say that maybe part of the reason you don't enjoy it is because you are feeling emotionally distant from your husband. This can make a huge difference. If you love him, and he loves you, you can work it out somehow.
However, after I read your "so what happened?" posting, I think you really need to set some boundaries and protect your daughter. Your husband should NOT be trying to have sex with you in front of your daughter, or to her detriment.
Sorry to say, but if you chose to have sex and to have a baby, her needs come first. She is totally dependent on you, and if you are having sex in front of her and denying her needs when she is hungry, then you are at fault for neglecting her. Yes, you. And your husband. You might not want to have sex, but if you allow it (which you do by staying in such a relationship), then you are ultimately responsible for the consequences, too.
You need to see that your husband has needs, but his needs cannot take priority over the needs of a toddler. I'm sorry to be a little harsh, but I need to take my own advice sometimes. I was very selfish when I first had my son, and had problems with his father. I was immersed in my own feelings and focusing on our adult relationship, when actually, the most important person is the child who looks to you for love, and looks to you as an example in the world.
Be there for your child, and everything else will fall into place. If your husband loves you, he will be willing to be less selfish, and if he doesn't change, then he isn't being good to you or to your child. Also, ask your heart if you really love your husband, and be honest with him, if possible. Take care and best wishes to you and your family.
Best,
Nessa
p.s. - You might also want to double check with a doctor that your feelings are not physiologically-based or hormonally influenced. I went through some "mommy blues" for over a year after giving birth. My feelings about life changed a lot when I became more balanced again, too. Best wishes.