Finally after 4 yrs a BFP, 7 wks, I miscarried

April • Trying for baby #2!
We had been blessed with a miracle. We had been trying for 4 years. Doctor said it was "impossible" but we did it! 7 weeks and 1 day. But this morning around 3am I started bleeding heavily and cramping. At 6am I believe I miscarried. I'm devastated. When can we try again? Please help me! I need advice. My friends and family don't know anything. Just my spouse...