Nak, I'm so sorry, this is heartbreaking, and it's totally okay to feel devastated right now. Please do go to your second opinion on Wednesday though, because your OB needs to confirm this with you, and you deserve clarity and support through whatever comes next.
A few of us moms have been through pregnancy losses, and honestly, having that second opinion really helped them feel less alone and more sure about their next steps. You're not alone in this, even though it feels so lonely right now.
Lean on your partner, your family, or a trusted friend this week, you don't have to carry this by yourself. Your doctor is there to help you through, okay?