Brown blood means it's old blood. As long as it's not bright red, you shouldn't be too worried. Since you are as far as long as you are, they are probably going to check your cervix to see if your dialating and then go from there. It may be a sign that your entering labor =) Good luck!!!
They will probably put you on monitors to track any contractions and baby's heart beat. They will also do an internal exam to check your cervix for effacement and dilation. You may have a new baby here soon =)