TTC after miscarriage

My husband and I are both 26. We found out in February we were pregnant! We went and saw the babies little heartbeat at 6 weeks. When we went back at 8 weeks the baby no longer had a heart beat. On March 31st I had a D &C. This is our 3rd time TTC since. My doctor said we could start right away after the initial 2 week mark. I was negative in April and May... I have to hold off till next week or so to take a test for this month. Anyone else in the same boat or have had luck after a miscarriage? How long did it take you to get pregnant?