trying to get pregnant

Hey guys, I'm new on here. My name is Diana and I've been trying to get pregnant for 3/4 months! Nothing has happened since and it kills me to wait especially cause we can't wait to have our first child. I've never taken any birth control and I'm 22 years old! My husband is 25. I was wondering, his family usually has trouble getting pregnant, for instance his mother and both of his sisters, will that play a role in us or no? I'm just nervous because I really want this!