I've had two miscarries, the first one was after my son was born, we miscarried in november 2007 tried right away and got pregnant again in 2008. my doctor put me on progesterone right away. good call on his side because i had a subchorionic hematoma which if dangerous to the baby can cause excessive bleeding and miscarry. because he put me on progesterone without thinking twice, it saved the pregnancy and we had a healthy baby boy. then in december 2009 we had another miscarry (the pregnancy was a surprise) so i didn't get too upset about it but generally i think of it alot. Now i'm pregnant again with my third child. I had bleeding and cramping two weeks ago, we had an ultrasound done and again, i had a subchorionic hematoma. but since it's above the sac it's not a danger to the baby but it did bleed out on it's own and that's why i bled. so, if you want, try right away to get pregnant, if you're finished bleeding, count it as a period and start your ovulation tracking, if you get pregnant, the moment you find out, call your doctor, get an u/s done and get put on progesterone. also, talk to him about taking baby aspirin your blood could be clotting in a result of a miscarry. because this has happened twice in a row, i think it has something more to do with hormones than any thing else. you do have kids already and if it's the same father, i wouldn't really read too much into a chemical imbalance. Good luck and hope to hear from you soon.