Heavy bleeding post d&c

Patient: Hi I had a d&c Friday Dec. 19th 2014 and today makes 13 days. the bleeding stops off and on from light to heavy, some days brown on the pad and just a little pink spotting when I wipe. I have had sex once on my 7th day post d&c and yesterday on new years I had a few drinks and smoked yesterday. no complications when urinating, no fever and no back odors. just sore in my arms, lower back & neck. what could this be?

Symptoms: Heavy bleeding on and off. sore neck, lower back & arms