Hello mam, thanks for trusting health care magic.
Looking at your history i can make out you are suffering from threatened abortion
In the meanwhile take full bed rest
, avoid straining at stools and avoid intercourse at all times.
I would like you to get a PAP smear
testing done to see for any cervical lesion if present.
most probably its not related to previous cesarean as it would have been evident on ultrasound
In case you have further questions you can consult me on health care magic forum and i will be happy to help
Take care and wish you all the best.
Dr Manisha Jain.