I had a baby on December 29 2011 and I had sex 3weeks and days after I had my baby.I'm not bleeding anymore and I went to my doctors for my 3week postpartum and he said my cuts healed nicely. And now that I had sex 5 times it hurts and like light bloody muckis or brown stuff will com out wand I used protection and what will happen if I keep having sex?

Because you are not totally healed and are not suppose to be having sex for at least 6 weeks after giving birth. You need to see your doctor and discuss damage having sex could have done plus possible infection issues.