As goldendawne has said, you have to do what is right for you. When children are young, they do take up a lot of energy and many, many mothers feel like you. You are not alone in feeling this way. I will look forward to your posts if and when they come up.
You are one awesome person you know that! I hope that other people can see that interacting with actual beings face to face is more than what we can actually think. Especially for mothers! :P