Congratulations!
Remember that every time you have a pregnancy, it can be very different how your body responds. Your body is already prepped to be pregnant because of your first child. You may look like you are pregnant a lot earlier than you did with the first and also further along. The symptoms come earlier. Also you are more aware of what is happening.
What is amazing is that if you were to have a third child it could be totally different.
It actually takes the human body a full 5 years to totally recover from each pregnancy. That means internally.
Hang in there. I know you are worried because of your last pregnancy, but just try to be positive.
I am sending you positive thoughts.