Opinions needed please

I have a 4 year old healthy and healthy pregnancy. I had a 13week miscarriage placental abruption in jan last year I got pregnant in july again miscarried before my appointment then pregnant in August and it was trisomy 18(I think)... my Dr said it is all bad luck.. we are planning to take our kids to Disneyland California in july and my Dr said as long as I'm not spotting but to maybe wait.. what would you do. All the reasons I miscarried were different it's not one certain thing that is causing it. I don't want to wait but I don't want to tell the kids we can't go as it was their Christmas present. Help!!!!