Thanks for writing to us,
It is normal to have few spotting of blood after intercourse ,due to any concealed clot of previous minor abberations.as your ultrasound
report says normal on the previous visit, It is nothing to worry.
If you still worried of your status and increased symptoms on further intercourse, advisable to consult an nearby gynecologist , regarding your issue.
It is advisable to have planned and safe sex
on the first few months of pregnancy