Sorry about your previous pregnancy loss. If your periods are generally regular, the heavy clotting should not in any way affect your pregnancy. If you are trying to conceive, my only suggestion is to start taking a prenatal vitamin with folic acid, and eat a generally healthy, balanced diet full of fruits vegetables and proteins. Make sure that your have no vaginal infection, because, some times infections can cause preterm rupture of membranes. See an obstetrician for pre-conception counselling.