1 mc, 1 chemical, now pregnant

Well, this definitely has been an emotional roller coaster. I had my first miscarriage at 8 weeks on April 3rd. Then I had one normal cycle after that. I found out I was pregnant again in June after being almost a week late. I started bleeding about 3 days after I found out I was pregnant. Dr said it was chemical. I didn't even have another cycle and I found out this morning I'm pregnant. I'm so nervous. Has this ever happened to anyone? Any success stories?