Why did you have a D&C AND a Novasure done together? It seem's an odd combination. After a D&C, you should wait at least 4 to 6 weeks, just as you would if you had delivered a child, you body needs time to heel. Especially with both of the proceedures that you've had. Having intercourse before then could cause an infection and/or an unwanted pregnancy. With Novasure, it is still possible to become pregnant, which is dangerous because you no longer have the lining of your uterus anymore, which an embyo needs to attach and grow. Your doctor should have given you a specific time range after the proceedures...and I would follow it closely.
Usually, they say wait until you are no longer bleeding, but I would have a checkup with the OB first. This is especially true if you don't want to get pregnant right away, and were not using birth control prior to this. Even pills take about a week to start working unless you start them by Sunday after your D&C or period.
You should check with your ob/gyn...I would say several weeks but that is a doctor's decision.