I'd like to point out that your child is not a toy to be played with. You don't get to say to your husband 'oh, well i don't like you anymore. and i don't want this baby, nor do i want you to have him/her'.
While I am all for adoption as an option in many cases, i don't agree with it in the situation you described. Unless there is some extenuating circumstance that would prevent your husband from being a good father, HE should be the one to decide whether or not he gets to parent HIS child...not you. I'm sure he already knows that you are pregnant, so how are you going to explain the disappearance of the baby once s/he is born??
You sound incredibly selfish, "I do not think being a single, working mother is for me"...maybe the baby would be better off with your husband.
I know I sound harsh here, but (as a woman), I think it's incredibly unnerving that women think the father has no say when it comes to their mutual baby.
If you don't want to raise the child, fine. But the father gets 'first dibs', even a court will tell you that.