Blessed to be 12 wks tomorrow, but today was my original due date after first IVF

Having such mixed emotions as I will be 12 wks with twins tomorrow after IVF, but my original due date with my first was today. Miscarried at 12 weeks so incredibly nervous about my u/s Monday because this is where we found no HB last time. I know every situation is different and don't want to bother friends/family with this, but looking for some support. Don't usually post, but thinking nows a good time to start...