What should I do?

What should I do? That the question I cannot answer in my self. Everytime I met some old friends, new friends,classmates they are mostly asked about if I have a baby. I just answered them I don't have yet. What is the common they want to say? What they mean it about? We try and try. We did not yet success to have one. I feel irritation on that question. Ofcoures, we wanted. We made our best can do. I have not yet babies before but my partner got three. So, who is have problem on that? Maybe, It is me! I am 24 years old. That's make me cried sometime and make me mad, upset, dissappointed. They force me to getting pregnant or what? I have no patience to understand on this people all the time asked that! Is it a normal question?. They knew at I did not yet getting pregnant asked again? Oh no.. I felt not good for that.. Who can give best tips to getting pregnant?