Freaking Out...

So I woke up this morning and had a tiny bit of spotting. light brown, just a little and it is already stopped. But I can't stop freaking out. This is the exact same timing as last time. just a few days before my scheduled U/S last time i had cramping & bright red blood (that stopped) and then at the U/S no heartbeat. I am terrified the same thing is going to happen to me again. I don't want a repeat of last time. I know I am totally paranoid. But still....