I had a baby in July and my period returned lightly for two months and now I have waited for it for over a monthand still no period,I took a pregnancy test about a week ago and it came up negative,but I amhaving very heavy flow and am not sure.

You are having a very heavy flow and you are concerned you are pregnant? If you are and I read your question correct, the answer is you are probably not pregnant. If you still haven't had a period since the birth of your baby don't fret, it is common for your body to return to a normal rhythm, give it some time. Or ask your OB/GYN at your next visit.