Thanks for the query.
I understand your concern.
The possible causes of bleeding in your case are increased blood supply to local genital structures, growing gestational sac damaging the surrounding vessels, bleeding on expected date of periods as small gestational sac cannot completely obliterate uterine cavity, impending miscarriage etc.
Usually, minimal spotting with these type of cause will subside soon.
But as you have passed large clot, better to consult your doctor once and get examined.
By examination and an ultrasound the possible cause of the problem can be identified and the wellbeing of the baby can be monitored then management can be planned accordingly.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.