Take treatment if there are any gynecological issues. You may do adjunct therapy by doing deer exercise for woman. Deer exercise includes kegel exercise as well. goole both the exercises and do them as instructed. I am sure it will help you in many ways.
Karina, I understand your frustration. For clarification, have you had an orgasm besides those two with him in the last year and a quarter? Have you had success while masturbating on your own?
The trigger could be emotional. Sometimes when everything is in place physically, certain emotional states can make it impossible to orgasm, and that's something that would take a good deal of calm reflection to "fix." If it is physical, keep in mind that as your body goes through experiences like abortions, etc, your sexual needs may also change somewhat. This can even happen on its own as time passes. You may have a sensitive spot that you rely on for so many years and then one day it may have moved. You may think it's gone, but it'll just take time and patience to find alternatives.
Hope this helps.