The first time I was pregnant I got pregnant quickly (within 2 months of trying) and I had a miscarriage at 6 weeks. I went to a specialist immediately after the miscarriage to determine if there was a problem that I had in order to attempt to avoid future miscarriages. At that time, it was discovered I had a clotting problem. It took me two years after that to become pregnant again. After a successful IVF implantation, I then had a second miscarriage after 4 weeks. Apparently, I also have a progesterone issue which was discovered after the second miscarriage.
Two months after my second miscarriage, I became pregnant (on my own)again. With much help (heparin injections for the clotting problem and progesterone supplements through week 14), I gave birth to a healthy baby.
After trying for well over two years again, I received IVF treatments. I got pregnant for the fourth time about 15 weeks later. I took all of the medications and despite that, I had a second trimester miscarriage. I went for several sonograms and the baby had a very strong heartbeat at each sonogram, yet the pregnancy did not last. Despite that, I feel confident that it will be possible to have another child.
I think you should speak with your doctor and see if there are any tests that they can give you (as I had) in order to determine if there is a problem with either you or your partner. If the doctor is not able to do this, perhaps he/she can recommend a specialist for you to see. As far as the cause for my two early losses, I know it was a clotting issue and a hormonal issue (low progesterone). I hope this information helps you. I wish you both much luck.