HELP!!!!

I'm 23 years old. I'm getting baby fever. My boyfriend and I just want one and course it will be our first child. But here the issues i can have sex multiply times still not get pregnant... I had went to doctor they say aint nothing wrong with me healthy... Course im stable n own crib n etc It just hurt when i see everybody around me pregnant and im last and my family to  have a child. Its me or just not my time.... Or im curse....