I feel like giving up ?

Ok so like I think I'm giving up:(! I don't think I can have babies and I'm to afraid to go to the doctor? I've been TTC for 7 months and nothing and I'm young (19) me and my boyfriend really want a baby and it's not happening and it's because I don't get to see him a lot because he is always working I do try to take advantage and have sex when I see him but sometimes he is even too tired to wen have sex? should I give up?