S.P.
I am only the mother of one, but I have dealt extensively with infertility and having trouble conceiving a second child is called secondary infertility. However, if you are under the age of 35 you have to have been actively trying to conceive for one year before they will even attempt to make this diagnosis. If you are over 35 the wait is 6 months before seeking out a fertility doctor. I do know how hard and frustrating it can be as it took me over 2 years and IVF to conceive my son, but give it some time and I bet it will happen before you know it!