Am I going to have a miscarriage?

Im 15 weeks pregnant and monday night my husband and I were having and I started bleeding alot but I didnt have any pain or anything. We both freaked out and rushed to the ER, I was in hysterics thinking we had killed the baby. So we rushed to the hospital and I had blood tests done and a pelvic exam and they checked the babys heartbeat, but that was it I thought they would do an ultrasound or something. Anyway blood tests came back and she said my hormones were really high for how far along I was. Is that bad? But everything else came back ok urine test and pelvic exam, babys heartbeat was good and strong. She said she removed a blood clot when she did the pelvic test. And her conclusion was that having burst a blood vessel on my cervix and that everything was ok expecially since I didnt have any pain. Does that sound right? They said im considered a threatened miscarriage now and not to have or use tampons or anything pelvic. Im worried I called back and they said everything was ok and I didnt need to come in as long as I stopped bleeding and didnt have any pain. If they said I have a threatened miscarriage wouldnt they want to see me? Whats the chance I will have one? Im a first time mom and ive never gone through this, im scared, can someone give me advice? :-(