C.N.
You can never get rid of the worry- I've had two in a row, and now I have had two successful pregnancies since - and it was never any relief until my ultrasounds. The only thing to know is, you have no control over this- no matter how much you worry- you will not be able to stop it if it is happening. And, maybe talk to your doc- they put me on progesterone with the second. Might be worth a shot. Also, if you drink coffee- stop. I am slightly convinced that it increases risk of miscarriage(I drank it before I knew I was pregnant with both miscarriages).