is it normal to have bleeding for more than 7 days during M.C suddenly after 7 days?? also, after the period ends, there is red and sometimes brown fluid instead of white and it is going on since 4 weeks..is this normal too??

It depends on when the miscarriage happened and why. These are question best left to your doctor. With bleeding, if you're filling up a pad in less than an hour it is something you need to go to the hospital about. Your body dealing with the end of a pregnancy can give you weird periods and weird cycles. Probably for a few months things will be... off.