I did have trouble having children, but my difficult experiences did not come from not being able to conceive. I could conceive easily - I had difficulty carrying my pregnancies to term. My experiences are old, but you asked so I will share anyway.
Starting 34 years ago I suffered three miscarriages - two of them late term at 6 1/2 and then 7 months - before being diagnosed with an incompetent cervix. Basically my cervix was too weak to carry the weight of a growing baby and when the baby reached a certain size it put pressure on my cervix which caused me to go into labor far too early. Once this was determined I was told that there was a surgical procedure that could be done when I became pregnant again (the fourth time in three years for me) which consisted of inserting a circular piece of plastic under the skin at the end of my cervix to hold it closed. The idea was that with this in place I would not go into premature labor, but I would either have to deliver by Caesarian section or have this piece removed (and then reinserted each time I became pregnant) to deliver the baby vaginally.
The miscarriages were devastating to me. I was young and had never really had a bad experience in my life prior to the first unexpected miscarriage. The good news is that at age 23 I was finally able to carry a healthy son to full term. I did choose to deliver him by Caesarian section because I was young and thought that I might want to have more children later on. The way my life went, I did not have more children until years later, at ages 34 and 36 - two more healthy sons.
The plastic piece held up for all those years much to the amazement of my doctors.
Due to my own experiences in the pregnancy and childbirth arena, I have a tremendous sympathy and empathy for any couple wanting to have a family that is having difficulty doing so. It is such a heartbreaking thing to go through and so many people (without intending to) say things that hurt you. I do hope that you will find the answers that you are seeking to help you have a child.
Medicine and technology have come so far in the past 30 years that the odds of a doctor being able to discover why you are having difficulty having a child and then being able to correct the problem are greater than they have ever been. My heart goes out to you and I do hope that you are able to have the family you desire.