I just had a miscarriage 6 days ago and i masterbated. my bleeding had already stopped but after that it started again is it normal or did i have to wait?

Not unusual: It is not uncommon to have some spotting or bleeding after a miscarriage for 1-2 weeks. External masturbation should have no risk but using a dildo could if very vigorous. After giving birth, it is usually recommended to wait to have sex for 4-6 weeks, but risk of infection, etc. is most common if having sex within 2 weeks. The closer to term, the more a miscarriage mimics a delivery.