Issues with Baby dancing

So me and my SO do not live together yet? It has been kinda rough but we have been trying to have a baby. The thing is that we can't really do the deed because of our work schedule and we hardly get anytime to do it but if we can, the only times we try is around my fertile days. If lucky it would be 2 or 3 times that week. Can that be the reason why I still can not get pregnant?