unviable pregnancy

So I went in for my 12 weeks appointment and was told I had an unviable pregnancy. I am beyond devastated and don't know how this feeling of sadness ever goes away. 4 weeks ago I had a little nugget with a heartbeat and today I have nothing. I have to wait all weekend and go for a d&c on Monday. I want to go for a second opinion because I still feel pregnant and even have a little baby bump. I feel like I'm in a bad dream. Beyond sad. And feel so empty. Anyone think I should go in for a second opinion? Or would that just be double the amount of trauma for me emotionally? I feel so lost 😔