I can imagine that it is a painful reminder when this time of year rolls around. Before we had our DS, we had a m/c, but it was quite early (around 8 weeks) at the beginning of March 2007 (way before our IF issues cropped up). We were crushed. I remember coming home from that fateful u/s appointment, falling to my knees, sobbing uncontrollably and just repeating over and over and over to God, "I trust you. I trust you. I TRUST YOU." Although I still think of the child that was to be at various times and especially in March, I just marvel at how things were worked out. We had our DS the next year...in March. What an awesome, awesome, AWESOME gift and at the perfect time.
Expanding your family WILL work. It may just not be at the time or in the way that you wanted, but I truly believe that once it happens, no matter the circumstances, it will be perfect.