I counsel with women that have had reversals. This is my common advice to those that do not conceive:
I had my reversal in 2002 (over 7 years ago). I have had one miscarriage. I will turn 44 this week, more than likely I will have no more children.
Not everyone that has a reversal will have more babies, no matter how old you are, no matter how good your HSG is, no matter how careful you are to chart, etc... My reversal doctor has a high success rate, but it is not 100%, no one has that. It is not always someone's "fault" if there is no conception.
Our ability to conceive is up to God, after all OUR INTERFERING with our fertility is what got all of us in this mess to start with.
If God chooses not to give us more children, it DOES NOT mean that He loves us any less.
It has been a VERY, VERY LONG AND HARD road for me to learn the lesson of contentment; to learn that my life is all about submitting to His will, not about me being happy! Once I learn that lesson in one area of my life, He teaches it to me in another area.
I LONG for more children, but I long even more so to greet God face to face one day and hear, "Well done good and FAITHFUL servant". That means I take one day at a time, doing what He has put before me with a spirit of gratitude, rather than resentment and pouting.
I can honestly say I am a better person (more humble, kind, focused) because God has chosen NOT to give me more babies. Do I understand this? No! Do I trust Him? YES!
It's all a journey, with lots of bumps in the road, but that is what causes us to cling even tighter to Him!