Should I be concerned?

My boyfriend and I have decided that we wanted to try and have a baby and we’ve been trying for the last 3-6 months and nothing has happened for us yet.

I’m so ready to have my third child and I don’t want to have any kids after I’m 35 years old. I haven’t had any problems conceiving before and now since I want to conceive it’s not happening.

Should I be concerned about my body being able to conceive or about my boyfriend being sterile because he have no kids at all? Please help me