Hi ! I too have a two year old daughter and she came in the first month of trying ! I am presently 10 weeks pregnant and it took dh and i 9 months this time around. I am also 35 years old now, which may have something to do with it. I am not sure about " the second one being easier thing " In my case, it sure wasn't !! Good things come to those who wait.
BEST OF LUCK TO ALL !!