Even cramping isn't always a sign for concern. It only becomes worrisome if you start to experience severe cramping along with bright red/clotty bleeding. This would be a sign that miscarriage could be happening. Mild cramping is very normal and many women will experience this in early pregnancy.
Its all FINE as long as you dont have cramps going with that!!
As soon as there are cramps you should start worring!
Have a wonderful day
Yes it can be but let your OB know. Brown=old blood red=fresh blood (and to be worried about). Also look out for cramping that would be worrisome.