blighted ovum

I went for my 8 week appointment and during the ultrasound the ob didn't see anything and he said it was a blighted ovum. I'm devastated and shattered I feel empty . Anyways should I get the d&c or wait for it to happen on its own? It will end in a miscarriage regardless. I feel awful right now not sure if that has anything to do with it . Woke up feeling sick and I figured it was morning sickness like usual and it's been going on all day can't keep anything down. Also when can I start ttc again?