Pregnancy after a miscarriage?

My husband and I found out we were pregnant in August. It was not planned, and we were very scared. But then we got very excited and couldn't wait! We went to the dr when we were 6 weeks 6 days. We went early bc they had to switch some medicines I was taking. Anyways, the sonar said I was 4 weeks 6 days so we didn't really see anything. The next night ( friday sept 4) I begin spotting dark brown. My MIL was a nurse and said that it was normal bc it was old blood. I went ahead and called the dr and he wanted me to do blood work. I did blood work on saturday and my hcg level was 4600. He said he was expecting to see around 2000. Monday when I had blood work done again hcg was 5600. It barely went up so he told me it wasn't looking very good. I had blood work done again wednesday and it was only 6400. We had another sonar done and the baby was already gone and the sack was beginning to collapse. The dr said it was prolly a blighted ovum. Instead of having a d&c, I took medicine that made me contract and dispose of the sack and placenta. My husband and I had almost a week to deal with this so we know God has a reason and he did it for the best. We weren't really ready to have a baby, but now we can't wait to try again! My question was when can we begin to try again or when is the best time really? I know it's sooner than when you have a d&c. I go back to the dr on oct 1st and I'm sure she will give me all the info then, but I was just wanting to hear it from people that have been through it. My dr really helped me through it bc she gave me personal advice instead of "dr" advice. She said she has been through 4 mc's. I'm sorry this is so long, it's just hard for me bc I don't really have anyone to talk to. I moved from all of my family and friends and don't really know anyone here except my husbands friends that have babies and never had a m/c. Thanks to everyone that responds to this and gives advice that is nice and not rude!