It's abnormal. Is pain involved? If yes, then it could be some serious condition. If not, then it could be just inflammation. However, a Colonoscopy is a MUST.
In the meantime, you need to take prescription medication to overcome stress. If prescription medicine is not readily available, then a safer and more natural remedy would be lemon balm extract (1 dropperful in a glass of water). It works as good as Valium.
http://www.lemonbalmextract.com/Are you sure it's blood clots and not something that you ate? Sometimes undigested food can look like blood clots (Example: Beets or Tomatoes).
Good Luck.