I think if anything having kids already makes it harder in a way. You know first hand the love and joy a child brings into your life. You know what you lost more intimately than those of us who are still trying for our first. Every cycle that I'm not pregnant now is harder, not because I didn't want it just as bad before, but because I know how wonderful and joyful I felt while pregnant, and I mourn that loss each and every cycle that goes by. You may not have to live with that fear of never getting to experience a full-term pregnancy and never becoming a mom in that way, but you are grieving all the same and in a way that I cannot.