K.M.
congrats on the new baby! when i had my 2nd, i bled for 5 weeks, stopped for a week (I was so excited!) - then spotted (I was so NOT excited)and then a few days later had another bout of bleeding for another week and a half or so.
clearly we're all different, but I would not worry about it and check with your Dr at your next post partum visit (or sooner if you are that worred)