It is not necessarily normal. I would call your doctor, they may want you to come in.
This is how some miscarriages start. I dont want to scare you, but better to be safe than sorry...call the doc and let them know what is happening. That is how my miscarriage started.
make sure you tell your doctor or midwife though:)
yes this is normal in the beginning of pregnancy, as long as its not bright red and heavy your fine.