Sexual intercourse is not a cause of miscarriage either spontaneous or recurrent. However there maybe problems in the pregnancy where the intercourse may have precipitated the miscarriage in an already weak pregnancy. Yes the trauma could result in bleeding after 10 to 14 days. Remember this is not a direct cause.
Next Steps
In the next pregnancy get your check up done as soon as
pregnancy test is positive for right advice
Health Tips
Always have 3 months gap before next pregnancy