6 weeks. A fair amount of cutting was done to remove your uterus. Although you can't see the area and you probably feel pretty well, I would recommend waiting until the inside tissues heal, approximately 6 weeks.
About 8 weeks. You should usually wait approximately 6-8 weeks prior to engaging in sexual intercourse to allow for the vaginal cuff (where your physician sutured) to heal completely. Of course, if there is any complication, it could be longer.