could this mean i can't have children

Probably. I do the same thing and cannot get pregnant. Also If I do, I can't hold the baby. It always results in miscarriage after one month. And I know it's a miscarriage because it's excruciatingly painful. I've had 2 or 3 miscarriages now. Usually I don't even get pregnant though.

Or it could mean that you lucked out and having had sex during or around your ovulation time. I was in a relationship with a guy for almost 2 years and we stopped using condoms after like the 3rd time, and it took a lil over a year before i got pregnant, I was only 17 and of course it ended in an abortion (that I regret, but hey u live n learn) but look how long I was having sex before I got pregnant. Here I am at the new age of 23, and Ive been officially with my new bf for a year and 2 months, no condoms, no birth control and still not pregnant, altho I am trying now. Me and my bf were havin sex before being officially together for at least a year with no condom cuz I knew that he was the only guy I was with. Anway, I feel like you sometimes, as if I am unable to get pregnant, but I guess u can always consult a doctor.