Subchronic Hematoma. Hematoma?

Hi, Last Wednesday My sister got brown spotting, was rushed to the hospital, she is 8.4 weeks pregnant at that time, scan was done doctor said that she has got small subchronic hematoma, baby was doing fine heartbeat and growth was fine,doc said the clot which should get dissolved by its own, which was small they said, ever since then there has been spotting some times on and off, sometimes brown and once red, but just spotting while going to toilet once in day, should we scan again? Due to one time red spotting or should wait till are next scan and mointor which is after 15 days , when should we worry in subchronic hematoma?, is it going to harm the baby, she on complete bed rest, progesterone sr-200 twice a day, and ecoaspirin.