D n c op 8th may due to blighted ovum (11wks) when will bleeding stop? (i did have blood clots) can we try again straight away?

Variable. Bleeding after a miscarriage related D&C is variable and may last several weeks. Remember that instruments used during a D&C remove the tissue from the uterus down the base layer of the uterine lining. This leaves the lining slightly raw and friable (easy to bleed like when you remove a scab) for a time period after the procedure. Bleeding heavier than a pad an hour may be abnormal.