For one of mine, i had brown spotting and cramps on and off for a week and bit, then I had some bleeding that lasted almost 8 weeks. it was a bit hard going, and probably should of been a D&C but OB wasn't for it (I miscarried at 10 weeks...baby stopped at 8 weeks)

another one I had (later in the first tri), started off as spotting the day before then the following lunchtime was hard and fast for a couple of hours where towards the end I passed the baby. after that it practically stopped. some light period-like bleeding for about 5ish days.

I would go for as long as you are comfortable. I am sorry that you are going through this