Feeling discouraged!

I am 20 years old and just graduated high school due to being short on credits. I am signed up for college. I have a career plan. A good one at that (: I love kids I have tons of nieces and nephews. My fiancé is going to be 22 and has his GED and also is signed up for college. We have been TTC for going on 16 months and I couldn't even count how many BFN we have seen on this LONG journey. Does anyone have some advice to make it easier or things that helped you get pregnant.