Miscarriage Scare

Well I had a very rough morning. Woke up at 5AM to blood gushing out down below and I immediately panicked because my immediate thought was I was having a miscarriage. I also passed a clump about the size of my palm maybe 2 inches around and it was the consistency of grape jelly.  I had just been to the doctor yesterday had an ultrasound and everything was perfectly fine and healthy with me and baby. I am 11 weeks along. I called the doctor right away made an appointment to come in first thing this morning and she ended up checking baby's heartbeat which was super fast and normal just like it was the day before baby was still there and all the while I was just convinced that I miscarried. She said that I could possibly have a separation between the placenta and the uterine wall. I have never heard of this happening this is my fourth pregnancy and by far the scariest one yet. I have never had a miscarriage or any serious complications in the past. Has anybody ever had something similar happened to them and did everything turn out OK with you? Am I still at risk or have a higher risk of miscarriage now? I am told to take it easy for the next few days or weeks and no sex for a while and to try to relax as much as I can so that way it can heal on its own. But now I am paranoid that  somethings going to happen but the bleeding has stopped for now I just have mild cramping I can hardly notice it but I think I'm just paying attention to it too much now since that happened this morning.