Hi,
Welcome to ehealthforum,
You should consider giving a gap of 3-6 months to allow the uterus to heal completely to be able to support a healthy pregnancy after a previous miscarriage. You can start trying for pregnancy after atleast 1-3 months. Check cervical mucus changes and the BBT (basal body temperature) charting to predict your ovulation and time your intercourse for having fruitful results. Keep lying still for sometime after intercourse (do not change positions after ejaculation has occurred). Put pillows under buttocks to minimize spill. Have intercourse in positions that allow for deeper penetration for high deposit of semen. Have diet with foods rich in zinc content to ensure better maturation of egg and sperms. For further evaluation and assistance, visit your gynecologist/obstetrician. Once pregnancy is confirmed, go ahead with getting serial HCG levels tests to see if levels are adequate. If the levels are not found to be adequate, external supplementation of hormones might be needed to prevent another miscarriage/threatened abortion. Consider being in regular follow-up and monitoring of your gynecologist/obstetrician.
Take care.