Thanks for your query and an elucidate history.
If all the tests are normal, you still have to do the following tests if not yet done:::
HSG- hysterosalpingography- tubal patency tests.
If these tests are normal - try this....
Both of you to start taking tablet folic acid
once a dayAntioxidants
which have ginseng
- twice a day ( till you become pregnant, then stop ginseng and start plain multivitamins)
* Do not get out of the bed after intercourse.. fr a long time, give time for the semen/ sperms to enter into uterus
*You have to have an exact calculation or support of the ovulation studies which is done by ultrasonography
No sex till the ovulation date ( for 5 days.)
All the best , you will be a mother very soon , do not get stressed out on this.
Happiness indeed helps in fertilization.
The old sayings and methods do work - like going out of the town in ''those days''