Pregnant on Baby number 2

So just found out! Yes a baby is always a blessing but this is a big surprise! Both me and my SO are extremely careful im on the pill and he wears condoms (there hasn’t been an issue with the condoms breaking, and im always on top of taking my birth control). Any how we already have a daughter together who is 11 months almost close to turning 1, we are young parents and just got engaged so this is definitely a surprise. We are just scared nervous, well he’s perfectly calm but I am really nervous and scared my first pregnancy went really south and I almost lost my baby girl. So I’m highly scared and was wondering if anyone else experienced this?