trying for #2

Dee • 42, happy mother of a lovely boy through ICSI on 3rd round. TTC #2 since June 17
I managed to get pregnant after we dealt with infertility issues for more than 3 years. Apart from a damaged/clogged fallopial tube on one side the reason for 'infertility' is unclear still.
Since I'm soon hitting 40 we thought it might be smart not to wait for too long to try for #2. 
Anyone in this group who has survived infertility and is trying for #2?