Aww sayang, this is really something you need to discuss with your doctor or go to the hospital right away, don't delay on this one, ok? At 6 weeks with retained tissue, a medical professional needs to assess you properly to make sure everything is safe and you don't get an infection. I know you prefer not to do D&C, but please talk to your gynae about what options are actually safe for your situation, sometimes there are alternatives, but they really need to check you first. Sending you strength, stay strong ya