In Tears

Ladies, I am 26 years old and have been trying to conceive my first child for 9 months now. I am on day 31 of my cycle and I range anywhere from 26-33 days per cycle so I get my period regularly. I haven't taken prenatals as regularly as I should. Today I took a pregnancy test and I got a BFN. I was extremely upset.
My husband's mother and father had fertility problems. His father had low sperm count when he was younger, and they had 3 children. Even my husbands brother and sister have children. What do you think I should do? I am just so sad and in tears. :/
Thanks for your help and encouragement. I really need it. ❤️