Help me please anyone

Sarah
Me and my fiancé been together for 2 years and have been trying  for 4 months and I started using this and it's been about 1-2 months of trying and still nothing and it always comes out negative. My fiancé also drinks monster everyday all day could that be the problem. But everytime it comes out negative he gets rlly up set and blames himself bec we haven't got prego yet. And I just wish we could any advice