I just lost my baby but want to get pregnant again !! Weird?

Two days ago I went to my Dr to have an ultrasound, and I found out that my baby didn't have a heart beat. I was 9 weeks and 5 days. They didn't tell me why and I just can't believe it. I'm hurting physically and emotionally. But I just feel like I want to get pregnant again. Is it weird, wrong, selfish? I didn't plan my pregnancy but I felt so good and calm. I'm married. I just feel so envious!! All these women who don't value their babys, pregnancy enough and they get to be pregnant several times!! And I Just felt like I was all down for it, without a doubt and then I lost my baby. I know it was still little but still hurts.😓 
I feel so lost...