I had bleeding that first was brown spotting, I didn't rest and starting having cramps in my back then I bled and I miscarried at 7 weeks. Sometimes bleeding can happen and everything will be ok. Just relax and talk to your doctor.
Every woman and pregnancy is different with my first pregnancy I had brown spotting and I miscarried so I urge you to get checked out let a doctor decide if it is normal or not it's always better to be safe than sorry