I sort of have the opposite problem - I don't want kids, never have done, never will yet i get people telling me all the time that ill change my mind or that when i meet the right person everything will change. It frustrates the hell out of me. I don't know if its an option but could you go for testing to put your mind at rest? This isn't obviously a guarantee that nothing in the future might affect your fertility but for the mean time it might make you feel a bit better? Remember, if your willing to consider them there are other options available if you do find yourself unable to get pregnant naturally. Good luck