Took us six years to get pregnant with our first child who was born September of 2016

Took us six years to get pregnant with our first child who was born September of 2016. We just got married this past September. We started trying for a second child in August thinking that it would take a long time yet again. We were wrong. Three months of barely trying and just pulling the goalie and we're pregnant again. I'm in complete disbelief and terrified and I feel extremely guilty and sad that my one year old won't get to 2 before having a sibling. I'm also insanely excited to have a second child. So many mixed emotions.