It is scary .
Sadly all of us are different and bleeding is something very common in early preg that doesn't have a defining timeframe.
I've had 3 pregnancies and bled with 2.
Sadly baby #2 wasn't to be, but Nate faught through bleeding up until 25weeks. He's happy and healthy at 5 months now.
Make sure you aren't doing anything strenuous and getting heaps of rest.
again.