What Hoobley said

If you are still bleeding even if it is a small amount there are lots of little places where blood can pool and then clot. This usually happens when you sit lay still for some time. The clots usually show themselves the first visit to the toilet in the morning or after sitting for a while eg watching TV. If they are small (the size of your palm then flush them. If you have any flu like symptoms keep the clots, take you temp and if it is up call your midwife.